I sold my Santa Cruz a while back, but I still have my F2 in one of my other boxes. They do not use the same chip. The F2 uses a chip that is actually a step down from the one used by the Santa Cruz and Herc GTXP. It is missing a few features, primarily .mp3 hardware support. As far as stability is concerned, they're about the same, but I think WinXP drivers could be better.