Although this is the onroad forum
I think brushless has more advantages for offroad than onroad, due to better sealing. I just run my electric T3 in with the nitros. Offroad, the Novak 4.5 it is highly competitive, as fast or faster than stadium trucks - IF you have enough traction to put that power to the ground. I am near the top when traction is good, but struggle when traction is poor.
Oval it was slower than the top nitros, but better than average.
But really it comes down to... what does the tracks you race at allow? Or what will they allow in the coming year?
Getting the 4.5 brushless for bashing was SO much fun and SO easy, it got me back into competitive racing again.
I only have experience with the Novak so can't compare versus others. But I have thoroughly enjoyed mine.