I've narrowed my choices down to 2 engines..........

YS91
Saito 100

I've heard so many conflicting reports it's really hard to make a decision between these 2 engines. I assume they are pretty close on power. The YS has a pump, but at the same time is more expensive and heavier.

The motor will be going in a UCD3D.

I'm looking for Power, realiablity, cost. And am I correct to aaume the YS needs a higher nitro fuel than the Saito?

I need your opinions!