[AdeC]

Depends how you define competitive I suppose.

An OOTB Revo will be pretty competitive with one that's been prepped but not sure I'd agree a similar statement is true of those Ade.

Horses for courses I guess. Revo's tend to be fairly mediocre around our circuit (don't know whether its a weight, torque, motor or gearing thing), whereas we run box-stock classes of the others in various forms with good results.
But if this proxy has shown anything, it's that you can take the same cars to a different track and have completely different outcomes.