I'd go for the 6600 as the 6200 can't be modded any more. I'm not so sure that having 256megs of memory helps this king of GPUs as they can't process that much (as urern00b said). You could find a 6600DDR2 128Mb that performs a lot better for about the same price.
6200oc or 6600
6200oc 256mb agp or 6600 256
which card should i get, i'm quite the game like x3.
which card should i get, i'm quite the game like x3.
