Not to sound like a fan boy, but if the 35 4-stroke is the same quality as the 35vi 2-stroke then you're not going to beat the roto motor. I've got the 35vi and it's top quality. I like saito's (don't get me wrong) but the roto is amazing when you hold it in your hand. However, I'm sure the roto would be a little heavier than the saito.