The two new 13-inch MacBook Pros have the same prices as their predecessors, $1199 and $1499. The new $1199 13-inch MacBook Pro now comes with a 2.4GHz Core 2 Duo processor, a 250GB hard drive, and 4GB of RAM. That's up from the 2.26GHz Core 2 Duo, 160GB hard drive and 2GB of RAM in the previous low-end model. The $1499 13-inch MacBook Pro has a 2.66GHz Core 2 Duo processor, 320GB hard drive, and 4GB of RAM; the previous $1499 model had a 2.53GHz Core 2 Duo, 250GB hard drive and 4GB of RAM.

Updated graphics represent the biggest change to the new 13-inch MacBook Pro. Both models use Nividia's GeForce 320M, which has three times as many processing cores as the Nvidia GeForce 9400M graphics used in previous models.

The new 2.4GHz model earned a Speedmark 6 score of 118, just over 10 percent higher than the 107 scored by 2.26GHz model it replaces. In the individual tests results that make up Speedmark 6, tests involving Photoshop, iTunes, Aperture, and iPhoto showed the new 2.4GHz model to be just 2 or 3 seconds faster than the 2.26GHz system.

The biggest performance difference, as you'd expect, was in our Call of Duty frame rate test, in which the new system, aided by its GeForce 320M graphics, was able to display twice as many frames per second than the older model with its GeForce 9400M graphics. Though improved, the new entry-level 15-inch model was able to display 30 more frames per second than the fastest 13-inch MacBook Pro. In our Compressor encoding test, the older low-end 13-inch model was about 2 percent faster than the new one.