It shouldn't matter. Both should be functionally identical. Your message above is almost unreadable - let folks know what OS you are using (Vista, I think - but which one?). If it's Vista 64, as I understand it, not many drivers have been 'signed' so they will work, but that's just shooting in the dark here. I didn't go down this particular path, and stuck with XP SP3 - so perhaps someone more Vista oriented can jump in here.
73 Mike