Apart from runtime, performance seems to be a bit better with the MMM. It accelerates much harder from a standing start, and when hitting jumps, it seems far more aggressive. I've got the punch control set to 40% for both ESCs.

With the MM when it was hitting 2nd gear and getting to top speed, it seemed to be not as fast as when the Revo was nitro. That was with 5s1p. When I tried it with 5s2p it was MUCH better, as the amp draw was split between both packs and therefore was less voltage sag. Even the MMM is not quite as fast as the nitro down the straights, but the voltage sag is even more pronounced with the MMM so I'd imagine when I try 2p it'll be much better.

I haven't tried 2p with the MMM yet because when I had the 5s2p in the car, I landed a jump badly and broke a rear shock shaft :(.
Thats the main reason for seeing if people recommend 4s2p and a higher kv motor like the 7XL :D