[MetalMan]

There's more than that. For one thing, the Mamba Max motors are 540-sized (the rotors). Novak/LRP rotors are 400-sized, which is what they need to be to be ROAR legal. Also, the winding pattern of the Mamba Max motors might not be right.

But hey, why should ROAR not allow these new motors/controllers? They're better AND cheaper (and the prices will continue to drop) than the Novak/LRP motors/controlers, which means they're easier to obtain for the normal person. At my local track I'll see if they'll let me race with a Mamba Max setup and 2s Lipo - wish me luck! (it's SoCal RC Raceway, and they're not the type that would normally stray from ROAR rules)