I have witnessed stock cylinder banshees on alky take out a 800+ cc Raptor (700 based) and a 700+cc (660 based) Raptor on the bottle. I will agree that a 4-stroke is easier to set up because of its broad torque from bottom to top, as it helps for traction in the sand (very smooth power). You put those same bikes on pavement I mentioned above and it would not even be close, the banshees would destroy those Rappys even worse. Once a banshee has traction its lights out, its hard to beat something that carries its torque from 6k to 10.5k. That's 4500 RPMs of ass kicking power. Remember also that power is actually a rating acceleration over time , or simply torque over time. Torque is a rating of force hints FOOT POUNDS. Diesels have a shit ton over torque but are not fast because they can only carry their torque for a short time. This is why they lack in the HP department. Keep in mind that it is allot easier to make torque at low RPMs than high RPMs. Banshees are so fast and hard accelerating because they make tons of torque where it is hard to make -- HIGH RPMs. There is a huge difference of making 60 FT/lbs of torque at 4k then at 8k, as it takes so much more twisting force or acceleration at 8k to make the same 60 FT/lbs of torque. This is the direct reason for HP, for without this equation we would not no that 60FT/lbs at 8k is actually much faster and harder accelerating than 60FT/lbs at 4k. This is why drag racers today are trying to make broad torque at such High Rpms. They have naturally aspirated 427 LSX series engines revving to 9500 Rpms and running into the 7 second club for a reason.
Blah blah blah, we wont even get into details about how much inertia is generated by a 9500 Rpm 427 cubic inch motor
Same thing for a banshee, thats maybe why banshees always have and will hold all the records in 300 feet, not even including their high HP.
Four strokes blow most of the time, but in the hands of a true engine guru/engineer they are actually relatively scary.