For the USGT motor, how consistent are the motors, motor to motor these days as far as performance?

Basically wondering if these could be good motors if a 21.5 class got going here for say 2wd buggy. I have heard that places that use the hobbywing 21.5 motor have seen significant RPM variance motor to motor (like 10% from what they are saying) so curious maybe this could be better option to use.

Lastly, other than more timing on the oval motor, is there anythng different about the USGT Oval motor and would these be a better or worse option for 2wd buggy, in your opinion? (sorry don't know much about these)

Thanks beforehand for any help!