That thing is awesome! Without knowing the driver skill or setup there's no way to really compare it, but as a toy that 4-stroke is sweet.

Just for a talking point, here's a (several year old) dyno comparison between 2-stroke and 4-stroke motocross race bikes. Today's chart would look similar, just the numbers would be bigger. The top group of lines are the 4-strokes.

2-stroke vs 4-stroke MX dyno image


Note the 4-strokes are larger displacement, yet they rev higher than the smaller 2-strokes. If you've ever ridden motocross bikes what you'll notice is the 2-strokes build rpm faster, but the 4-strokes have significantly better traction and hookup and the result is the 4-strokes are indeed much faster on the track. Acceleration through and out of corners is much better, jumps with little or no run-up are much easier, you can go faster on slippery tracks, etc.. I would think the benefit to an RC car would be similar. The catch is displacement; it takes a little more displacement for a 4-stroke to get similar horsepower to a 2-stroke, but the torque curve is much smoother and the power is much more usable. At least on a race track. Are there displacement limits in RC? Would it be legal to race a .4 4-stroke against a .21 2-stroke?