Originally Posted by Armonster

These days they are so similar you're better off getting what looks/feels better to you (and what you can get a good deal on). But if you're into magazine comparisons and whatnot, the gsxr has been winning that comparison for the past couple years, but the cbr was winning year after year before that. Also, the gsxr's ergonomics make for a slightly better track bike (adjustable rearsets, for example) while the cbr is a little more comfortable (after the 2007 redesign anyway). Go get on some forums and start searching!