Theres a difference between torque and horsepower. 4 Strokes have more torque at lower RPMs than 2 strokes. Some may call it stump pulling power. Look at drag racing for example. The good ole 4 stroke OHV is the choice of of the fastest cars, top fuel. They are low RPM and have an extreem amount of torque at low RPMs. An OHC 4 stroke has more RPM, but less torque at low RPMs. But I am not sure I have seen any OHC RC engines.

2 Strokes have more horsepower than 4 strokes at a given RPM range compared to an equally displaced 4 stroke. Plus they are lighter!

The question is, are you flying a 3D, Warbird or a speedy go fast plane?

Or, do you like a Harley Chopper, or a Ninja crotch rocket sitting weird like a constipated Frog?