ORIGINAL: Stick 40
I feel the same way about the newer four stroke power to 2 stroke.
I have several saito's and I think the saito .56 is equal or the same as any 2 storke .46 to .52. I started with satio .50 and thought they flew my .40 size planes very well.
I would have to believe that a Enya 4 would be about the same as what I have seen in my saito's.
In short, yes go with the four stroke and don't look back.
sticks
I don't use the smaller engines and I'm down to only one two stroke in use at the moment, it's an SK .91 and a true stump puller. It is designed for low RPM and high torque and throws a big prop like a four stroke. I have changed engines in different planes between the SK and the OS .91 four stroke. I like the four strokes better but I would say the SK still has more power, just not as much difference as there used to be. Four strokes are getting closer!! Then there are my YS engines but that's another story.