[E-Revonut]

I know the 70mm may be more ideal than the 60mm for a Revo but how much of a difference? I'm looking at 1600kv on 5s. I'm setting this up more for racing now but will bash with it as well. Tekno Neu is awesome but I think to much for the track. Last week I threw on my new bowties and hit up a very soft baseball field and all it wanted to do is wheelie! I'm gonna put my neu in a Maxx and want something with a bit less torque but that will still run cool. As I said this is kinda geared towards racing and I will never gear it for more than 40. Is the 60 enough or just get the 70?