Processing power, they are about the same, although the Celeron-M could possibly come on top more often than not (its a Dothan with half the cache).
Video wise, the Xpress 200M is actually newer (and presumably better) than the Radeon 9000 IGP, but single channel 32MB versus dual channel 64MB would probably tilt it in favor of the Radeon 9000 IGP.
If you want to make the Celeron-M system better, just do the pin trick and have it run at 133FSB instead of 100FSB (depending on whether or not the notebook supports 133FSB, but since its a Dothan, I would assume so).