A GSXR 1000 are quick they can reach up to almost 300km. Harelys can be quick it depends on what CC is the bike. But if I had to choose one it would have to be the GSXR because it is relativily lighter then the harley. Get the GSXR! The only way a Harley would ever beat any gsxr whether the 600, 750, 1000 or the 1340 Hyabusa would be to drop it from a plane. Which is the only use I have for a Harley other than a boat anchor!