I have had a rustler, then got a stampede 4x4 and did just about everything to it to get it to handle better, centre diff, proline shocks, protrack wide wishbones, tried trencher tyres, j concepts subcultures. Lowered it, added sway bars, started looking at the slash chassis THEN bought my Proline mt 4x4 and in comparison it drives like an 1/8th buggy, and this is as it comes out the box.
The stampede was running 3s and I could never get 4s to work, it would either unload the centre diff or wheelie, just never seemed to get moving. The Proline is much heavier but with 4s is a missile, very planted and stable, needs a wheelie bar with that sort of power but other than that the driveline components are built to take the power.