My girlfriend has both of these machines, so we decided to run them side by side. They both had 2GB memory but we took out 512MB of the Rev C (well we had to take out 1GB and add a 512MB) and the Rev C is faster however when we had GoLive, Photoshop and Illustrator all busy doing things and then were typing in Pages the Rev B one did it fine, but slower, but the Rev C was faster but didn't keep up as well when typing. I guess this is because of the memory difference, but still seems a bit odd since Rev C has faster memory.
