Verified answer

Unless lightness and portability are of supreme importance, I'd go for the MBP. More CPU power, storage plus optical drive. Same Intel HD3000 Graphics. I have a 13" MBP and it does everything I need it to do. It's not the best for video encoding or hard core photo editing, so if you want that, get a desktop. Also, only having 2 USB ports is ridiculous, so get yourself a hub.

MacBook Pros are better than the MacBook Airs - more hard drive space and they're generally better computers.

GB as in RAM/Memory or storage?

MacBook Pro all the way!

macbook pro 13 is a great computer and fast

Macbook pro have 4GB (two 2GB SO-DIMMs) of 1333MHz DDR3 memory; two SO-DIMM slots support up to 8GB wit i7

Mackbook air 4GB of 1333MHz DDR3 SDRAM onboard-memory (with I5)