I say Yamaha would smoke CG 125 on a race track due to better handling, grip and braking. Which is the point of "sports" bike. Now what?
If you just want to make useless noise while going at ~110-130KM/h in a straight line, which you think is "fast", yeah, get an alter CG 125 with cut silencers, annoying everyone on the road just like those "chooraa"s everywhere.