Hmm, Athlon 64 will be better for games, and probably for performance too, since i've heard Pentium M isn't exactly a high performing processor. Its basically a low voltage, mobile processor, which would be used more in laptops than in Desktop PC's.
Athlon 64's are also cheap too, even for high CPU speeds
If you get a pin 939 Athlon processor, it'll also be easier to update later on to a new CPU if you wished to update, though of course to get any new processor you'll need to get a suitable motherboard first if the one you have now can't support what you want
As for laptops, i'm afraid i dont know too much about them to give you some opinions,
though the 1st link seems better as you have more choices for what you want and gives you mroe options. You get a high performing Pentium 4 proccesor with HT technoloy, over the 3700+ on the second link, which is still a great CPU adn might overtake the Pentium in some things (Though Pentiums are better at multitasking than AMD depending on the CPU speed you choose)
As for the video card specs, the first one again has a better deal, allowing you to go as high as a Radeon X800 which is better than the second links Radeon 9700 graphics card.
For everything else, the first link is also better, allowing for more memory increases, and higher ranges of hard drive space for you to pick from.
So if i were to choose, i'd go with the first purely because of choice.