You wanna say that again more clearly? ;D

I think what you're trying to say is the higher the Kv the faster the motor, and yes generally that is correct, since 5700 rpm per volt is faster than 4600 rpm per volt. But of course, that does not necessarily mean one is faster than the other when you plug in real world variables. the 4600 can be faster on 3S than a 6900 on 2S, if geared right. Incidently, the 4600 on 11.1 would be 51060 rpm, exactly the same as 6900 at 7.4v. I'll let you guess which one will be faster and run longer.