"The configuration we tested definitely offers better specs than the previous top-of-the-line MacBook Air. It's powered by a standard 1.86GHz Intel Core 2 Duo processor with 6MB of L2 cache, as opposed to the custom-built 1.8GHz Intel Core 2 Duo with 4MB of L2 cache used on the original high-end MacBook Air. The speed of the front-size bus has increased to 1066MHz, and the new MacBook Air models use faster DDR3 RAM as opposed to the slower DDR2 RAM found in the original Airs. In terms of storage, the new high-end Air uses a solid-state 128GB hard drive, twice the size of the SSD found in the original Air.
The MacBook Air is showing a significant improvement, although it remains the slowest Mac laptop and – at the price – is likely to remain a controversial choice."