The flux is brushless so that depends on teh battery you put in it. But that will be the fastest out of all teh cars. can say teh "top" speed being as i mention it depends on teh battery.

Pretty sure the sprint2 and sprint2 drift are the same cars. Just different tires (drift or standard rubber) and different styles of body shells. Nitro is nice but battery powered has really advanced it self over nitro.

If you just want to drive out of the box get a sprint, but if your going to end up changing the motor later on to brushless, get the sprint flux.