If you want a more sportbike ride, go with the SVS. The handlebars sit lower and the footpegs are back and up about an inch. I can still sit straight up on it, but if I want to ride it hunched over it's easier. On long trips, I pop out the passenger pegs and put my feet back on them, while lying my chin on the tank. It kind of looks like I'm flying.. But very comfortable...
On the "naked" version, the SV, the handlebars are more like bicycle bars, where they actually are connected via one bar, vs the SVS's clip on style. the pegs are also forward and down a bit which makes you more in the sit up and beg position, which is comfortable as well. You can always buy a windsheild for the naked SV from tiny like a ducati monster's to bigger than the SVS's.
for everything you'll ever want to know and plenty of advice, instruction, and photos, go to www.svrider.com