One more thing to think about is the idle speed of a saito compared to a YS motor. The saito will idle as low as 1800-1900 RPM while the YS may only Idle at 2000-2200 RPM, it makes a BIG difference when you trying to land on a small to medium size runway + lower idle just makes touch down so smooth and it sounds cool . I guess it really depends on the type of plane/flying and the auw of the model, each engine has it's place no doubt.