It'll do about 40mph tops.This can be alterd by gearing or buying a new motor. I dont know what a jato does but if i'm correct they're pretty fast because they're 2 speed and smaller scale. A jato however is 2 wheel drive and a buggy is 4WD, therefore a jato wouldn't stand a chance off road against a hyper 8. Also the hyper 8 will spend much less time in bits as its tough as nails.
If speed is all your looking for have a look at the Schumacher Menace.
My money would be hyper 8 all the way though.