So well, in fact, that the tablet market is often characterized as being a two-horse race between the tricked-out Amazon e-reader and Apple’s iPad.

But when it comes down to the numbers, the two companies couldn’t be more different, like comparing Apples to oranges.

Tomorrow, Amazon is expected to report a giant fourth quarter, but it’s guaranteed not to look anything like Apple’s monstrous results reported last week for the same period.

Here’s one data point: For the holiday period, Apple’s gross margin was an impressive 44.7 percent, up from 38.5 percent a year earlier. Meanwhile, analysts are estimating that Amazon’s operating margin will fall to 1.3 percent from 3.6 percent last year.

The specifications of the two tablets can be compared side by side, but a completely different vocabulary is needed to speak intelligently about the two businesses. Simply put, Apple is a hardware maker and Amazon is a retailer.

One has very high margins and the other doesn’t, resulting in two drastically different financial outcomes today. But over time, the idea is for that to change.

Rather than making money from hardware sales, Amazon’s approach to the Fire is to generate incremental sales from other goods and services on the device. Some analysts feel that, over time, that play can create a reliable and recurring revenue stream – and ultimately higher margins.

Tomorrow, Amazon is expected to report sales of $18.3 billion in the fourth quarter, up more than 40 percent from the same period in 2010, according to FactSet Research. Q4 earnings are expected to fall notably to 17 cents a share from 91 cents a year ago.

While revenue growth is impressive, the company’s profitability is being weighed down by losses from the $199 Kindle (which is not quite a break-even proposition), the construction of more warehouses across the globe (17 were added in 2011 for a total of 69) and other investments in infrastructure, like its cloud-computing services and media services, like video, music and e-books.

In contrast, Apple has a rich markup on its iDevices and doesn’t have much of the same overhead as Amazon.

Still, the number of consumers Amazon touches in just one quarter is staggering, and it continues to take share from brick and mortar retailers.

As J.P. Morgan analyst Douglas Anmuth points out in a report, e-commerce grew about 15 percent in Q4 in the U.S. due to strong holiday sales, but he expects Amazon’s growth rate to more than double that to 47 percent year over year.

Anmuth is also bullish that while the fourth quarter could represent a “low point for margins,” Amazon could start seeing an uptick in margin as soon as the first quarter, now that a number of services and some key infrastructure are set in place.

However, don’t expect much insight tomorrow into the company’s long-range plans. The Seattle-based company is typically short on details during its earnings release and call.

If it follows standard protocol, it could provide an update on warehouses being built next year, number of employees and other infrastructure investments, but will likely dodge answers about how many Kindles it shipped during the quarter, or how much Kindle Fire owners are purchasing on the devices.

For now, we’ll have to settle for analyst estimates.

On Sunday evening, Stifel Nicolaus analyst Jordan Rohan raised his estimate for fourth-quarter Fire sales to six million units from five million.

While only on the market for a limited time, that’s still a lot less than Apple, which sold 15.43 million iPads, up 111 percent year over year.

Amazon’s stock dropped 1.65 percent, or $3.22, today to close at $192.15 a share.

Posting third-quarter results Tuesday, Intel (INTC) said it earned 35 cents a share on revenue of $9.39 billion. That’s not quite what the company reported during the same period last year, when it saw earnings of 35 cents a share on revenue of $10.2 billion. But it’s much better than investors had been hoping for. Analysts had expected Intel to report earnings of 28 cents a share on revenue of $9 billion, according to a consensus survey by FactSet Research.

Not bad. Even better, the company bumped up its fourth-quarter guidance from sales of $9.7 billion to sales $10.6 billion. Consensus estimates have been calling for sales of $9.5 billion, according to FactSet Research data.

Intel’s rosier Q4 guidance suggests that the slow increase in end-market demand for PCs we’ve been seeing lately isn’t simply inventory refill but reflects an upswing in demand for end-customer goods. Perhaps that turnaround CEO Paul Otellini has been heralding for the last half year is not as far off as it might seem.

“Intel’s strong third-quarter results underscore that computing is essential to people’s lives, proving the importance of technology innovation in leading an economic recovery,” Intel CEO Paul Otellini said in an earnings release. “This momentum in the current economic climate, plus our product leadership, gives us confidence about our business prospects going forward.”

Dell (DELL) earned $472 million, or 24 cents a share, on revenue of $12.76 billion. Analysts surveyed by FactSet Research had expected it to earn 22 cents a share on $12.6 billion in revenue. Dell shares spiked nearly seven percent when the news was released, oddly, at 3:57–three minutes before the close of trading Thursday (click on the image below).

Lousy afternoon for someone in Dell Investor Relations. Anyway….

In a statement, CEO Michael Dell said demand for the company’s products appears to have stabilized and, believe it or not, things are starting to look up.

“If current demand trends continue, we expect revenue for the second half of the year to be stronger than the first half,” Dell said in a statement. “We are expanding our capabilities in enterprise technology and services and investing in our core business to distinguish Dell both with customers and in operating performance.”

A few quick highlights from the earnings statement and investor call before the official release, appended below.

• Apple sold 22.7 million iPods and 4.4 million iPhones during the quarter.
• It shipped 2.5 million Macs.
• Looking ahead to the second fiscal quarter of 2009, the company expects revenue in the range of about $7.6 billion to $8 billion.
• The release includes no mention of Jobs’s health.

During a call to discuss Apple’s latest earnings, Steve Jobs and his health were top of mind. Indeed, the first question of the call centered around this very issue:

Q: Well, since I’m going first, I guess I’ll ask how is Steve and hope he’s doing well. And I just wanted to know how, if you’ll run the company differently with Tim or the same and if need be, if Tim — do you feel like you would be the likely candidate if the worst case scenario were to happen if Steve was unable to return.”

Apple COO Tim Cook: There is an extraordinary depth and breadth in Apple’s executive team. And it leads over 35,000 wicked smart people. We believe we’re on the face of earth to make great products, and that’s not changing. We believe in simple not complex. We believe in deep collaboration. We have the self-honesty to admit when we’re wrong. These values are so embedded in the company that we will do extremely well regardless of who has the CEO Job. I strongly believe that Apple is doing the best work in its history.

Also the focus of some discussion the possibility of an Apple netbook. Is Apple considering entering the sub-$500 netbook market? Cook says not right now. “We’re watching that space, but from our point of view, the products are based on hardware that’s not very powerful, software that’s not that good and cramped displays. We don’t think that people are going to be pleased with that. It’s a category we watch and we have some ideas for it, but we think the products there right now are inferior.”

Here’s the official release:

Apple Reports First Quarter Results
Best Quarterly Revenue and Earnings in Apple History
iPod Sales Set New Record

“Even in these economically challenging times, we are incredibly pleased to report our best quarterly revenue and earnings in Apple history—surpassing $10 billion in quarterly revenue for the first time ever,” said Steve Jobs, Apple’s CEO.

A few quick highlights from the earnings statement and investor call before the official release, appended below.

• Apple sold 22.7 million iPods and 4.4 million iPhones during the quarter.
• It shipped 2.5 million Macs.
• Looking ahead to the second fiscal quarter of 2009, the company expects revenue in the range of about $7.6 billion to $8 billion.
• The release includes no mention of Jobs’s health.

During a call to discuss Apple’s latest earnings, Steve Jobs and his health were top of mind. Indeed, the first question of the call centered around this very issue:

Q: Well, since I’m going first, I guess I’ll ask how is Steve and hope he’s doing well. And I just wanted to know how, if you’ll run the company differently with Tim or the same and if need be, if Tim — do you feel like you would be the likely candidate if the worst case scenario were to happen if Steve was unable to return.”

Apple COO Tim Cook: There is an extraordinary depth and breadth in Apple’s executive team. And it leads over 35,000 wicked smart people. We believe we’re on the face of earth to make great products, and that’s not changing. We believe in simple not complex. We believe in deep collaboration. We have the self-honesty to admit when we’re wrong. These values are so embedded in the company that we will do extremely well regardless of who has the CEO Job. I strongly believe that Apple is doing the best work in its history.

Also the focus of some discussion the possibility of an Apple netbook. Is Apple considering entering the sub-$500 netbook market? Cook says not right now. “We’re watching that space, but from our point of view, the products are based on hardware that’s not very powerful, software that’s not that good and cramped displays. We don’t think that people are going to be pleased with that. It’s a category we watch and we have some ideas for it, but we think the products there right now are inferior.”

Here’s the official release:

Apple Reports First Quarter Results
Best Quarterly Revenue and Earnings in Apple History
iPod Sales Set New Record

“Even in these economically challenging times, we are incredibly pleased to report our best quarterly revenue and earnings in Apple history—surpassing $10 billion in quarterly revenue for the first time ever,” said Steve Jobs, Apple’s CEO.

That said, Yahoo’s second quarter is more likely to prove soft than not. Certainly, rival and benefactor Google’s own second-quarter results, reported last Thursday, don’t bode well for the company. Google (GOOG) posted profit and sales gains, but its results nonetheless fell short of Wall Street analysts’ estimates, sending shares lower in late trading. Yahoo, of course, isn’t in nearly as good health as Google. If Google fails to impress the street with a respectable quarter, how can the besieged and beleaguered Yahoo do so?

[Image Credit: Byzantin3]

Given all this then, why are Apple shares trading down this morning? Seems concerns about CEO Steve Jobs’s gaunt appearance at Apple’s World Wide Developers Conference in June have not subsided, nor will they, now that The New York Post is questioning his health. “Apple’s hedge fund investors are very worried,” said a Wall Street source who has spoken with some of the company’s stakeholders,” the Post reports. ” … Multiple sources who have met with–and in some cases even dined with–Jobs in the weeks surrounding the introduction of the iPhone 3G on July 11, said they came away troubled by his thin appearance.”

Given all this then, why are Apple shares trading down this morning? Seems concerns about CEO Steve Jobs’s gaunt appearance at Apple’s World Wide Developers Conference in June have not subsided, nor will they, now that The New York Post is questioning his health. “Apple’s hedge fund investors are very worried,” said a Wall Street source who has spoken with some of the company’s stakeholders,” the Post reports. ” … Multiple sources who have met with–and in some cases even dined with–Jobs in the weeks surrounding the introduction of the iPhone 3G on July 11, said they came away troubled by his thin appearance.”