I'm puzzled at the results of the various benchmarks I've been seeing. I read that Xbench scores these two machines as very close counterparts, whereas the MacWorld review of the 12" Powerbook puts it pretty far ahead in all aspects of performance.
I'm a former laptop Mac user getting ready to switch back to them. It's tough for me to judge real performance by noodling on the machines at the Apple Store. Any further insight would be appreciated.