General Question:

A Saito 100 weighs 20 oz while a YS 91 weighs 26 oz

Will I get better performance from the YS even though I am increasing the overall weight of the plane by 6 oz. ???

I am trying to decide which engine will be a better application for the Ace RC Staudacher (60 size). I think the Saito 100 may be the better choice due to weight. The plane will weigh 7-8lbs full up. I know the YS touts more RPM, but does the RPM increase "outweigh" (no pun intended) the added weight of the YS over the Saito????

Thanks for any input