Z750 is more practical for the street, low-end and midrange power. It just won't have the agility and speed of supersport when pushed hard (with equal riders on board). Plus it's a tad heavier than super sports, but then again it's meant to be as a streetbike.
You'll notice super sports are top-peaky, but will suffer under 3K rpms. Little harder to control on parking lot speed, but transition from side to side is easier at high speed. It takes a little more body control to bring it up from a good lean than a bike with bar-risers (like yours). If you're used to hitting top-end on Z750s, it won't be that radically different powerwise, but 636 has tendency to wheelie at lower gears on full throttle. Top-end on a bike is little different than a turbo car. On turbo cars, when the power spools up, you're basically pushed into the seat. On bike, it's more like spraying nitrous oxide, requires very good reflex/reaction time to guide the bike at that rate of acceleration, and tucking in. Top of that, there's wind to deal with.
Last edited by Z_Fanatic; 11-06-2005 at 11:45 PM.