For what its worth, I would go to a reputable suspension specialist in your area and give them your suspension specs, eg spring weights, ride height, camber etc and secondly how and where you drive.
Local suspension people will know the roads you normally drive better than some one at a remopte location.
From this they should be able to advise you on which is the more approriate Bilstein for your setup/circumstances to achieve the result your after.
When I overhauled my front end, I switched to 550lb Street and Slalom Coil Springs and Bilstein "Sport" Shocks from VB&P. The set up works great for me (street driving, not track). The ride is a bit stiffer and handles better than before.
I was a little concerned before installation because the springs slightly lower the front, but the result is very nice - the tires fill in the wheel wells perfectly now.
VB&P provided excellent customer service and answered my questions before purchasing the set up. I also got a discount for being a CAC member!
I have the Sports and they work very good, but they work along with other mod's. Just shocks alone won't due very much. Along with the Sports I have poly link bushing for the front and rear sway bars, rubber at the frame . I have a stock front swaybar 3/4" and a 5/8" rear bar. I think the 71' option 3/4" rear bar is for heavy duty springs and brakes on the LT1 & BB 454 (rpo/code ZR1 & ZR2). I think the most cost effective way to improve the already good handling of a Vette is... shocks, rear sway bar and good tires. Getting the weight down would be about the next best thing, but that can get costly.