Spec Showdown: Acer Aspire S3-951 Ultrabook vs. 13.3-inch MacBook Air

The first wave of Intel-inspired Ultrabook laptops meant to challenge the MacBook Air start landing this week with the leading the way.

The new S3-951 features a 13.3-inch screen, a 320GB hard drive, a Core i7 processor, 4GB of RAM, and a 20GB solid state drive loaded with Windows 7 Home Premium. Acer announced availability for its new Ultrabook on Monday, promising the new laptop will be available at "leading online and retail outlets" before the week is out. Amazon has a product page for the S3-951, but is only accepting pre-orders at the time of this writing.

The S3-951 is just the first of several Ultrabooks expected from Acer. The manufacturer says future models will sport Intel Core i3 and Core i7 processors and larger-capacity solid state drives. Given that the S3-951 had to use a hard drive to keep its price below $1000, it's a good bet that the next round of Acer Ultrabooks will cost more than $1000. That's a price point Intel hoped Ultrabooks would stay under when it announced the new .

Acer isn't the only company announcing Ultrabooks this week. Asus is expected to unveil its and UX31 laptops Tuesday at an event in New York City, according to the company's .

However, finalized specs for Asus' UX Series laptops have yet to be announced. So, while we wait for Asus' Tuesday announcement, here's a look at how Acer's first Ultrabook matches up against the 13.3-inch Apple MacBook Air: