From KBB.com

Essentially Z06s in body and suspension (minus the aluminum frame), the 2010 Corvette Grand Sports replace the former Z51 handling package with a happy marriage of Z06 looks and dynamics and the standard Corvette's 430-horsepower 6.2-liter V8. Astep above a standard Corvette in performance (thanks to more aggressive gearing) and especially in dynamics, these new 2010 Grand Sports are civilized on the road and fiercely capable on a track. You could comfortably pilot one to work each day and hammer it around a race track every weekend. Testing manual and automatic coupes and convertibles on local roads and freeways, then brutalizing manual-shift coupes on GM's high-speed development track, we found much to love and little not to like. On climate-cratered Michigan roads, their ride was controlled but comfortable and compliant. On the track, their handling and stability were near-Z06 awesome. Acceleration was always strong, braking stable and powerful, and steering crisp and precise. Uphill and down, through hairpins, fast sweepers and tight, tricky esses, with standard stability control on, they take a slight tail-out set powering out of each turn then dig in and rocket toward the next one.