Both machines handle photoshop, illustrator, etc. with ease. However, I have to run windows for some industry specific applications. (64 Bit Windows 7 using Parallels 6). The Mac Air runs Windows 7 (64 bit) faster, and the fan never turns on (ever) while running Windows 7 (64) bit. The only time my Mac Air's fan turned on was when it was brand new and it was indexing the hard drive.