I have both of these engines NIB and plan to use a 40 size FS on a future CL stunt/sport build. Probably a profile warbird model. For those that have direct experience with these engines, which one is considered to be more powerful? If I was guessing at this point, the warbird model will weigh in the neighborhood of 48 oz, with a wing loading around 14.

The Saito FA-40a is interesting as it is a full 2 oz lighter that the OS 40 Surpass FS.

Thanks in advance.