after having run 2-strokes for 12 years, i recently purchased my first 4-stroke, a saito 82. I have noticed that the throttle response is faster then 2-strokes. Although they might not spool from 5k to 17k as quickly as a 2-stroke (because they dont spool that high), i feel that they can rev from 15% throttle to 100% throttle much quicker then a 2-stroke. The power also feels much more useable for 3d because you have that torque and throttle response there in an instant. The strokers feel a little weak up top, where the 2-strokes seem to keep gaining more and more power as they rev. So basically, i think both motors have different power bands and therefore each has advantages in different situations.