Out of thoose two, I'd recomend the first one since it's better spec'd. The first things I notice in it's favor are:
Core2Duo is newer than the CoreDuo
The intel 950 chipset & graphics controller is newer than the 945
120GB HDD is bigger than the 100
Other than that they are quite similar and probably even use the same chassis.
The thing I like about the 2nd one even if it is a slightly smaller CPU and Graphics chip, is that it comes with WinXP. Given the amount of grief I see on here with people who have Vista, I would still hang with XP, with an option to upgrade once Vista gets sorted out. They had the same problems with XP until the first Service package came out.
dude, i wouold reccomend the satellite a205 s64107 instead of those two. it only costs $1049 from best buy (on sale), it has 2 gb of ram instead of one, it has 1.72 core2duo, and 200gb hd. its awesome. im on mine right now, i love it