Hi guys. Been trying to do research on this. Not much info i'm afraid.

Does anyone have firsthand experience of the performance differences between these two engines?

I have an alpha z852 and power wise, I'm impressed. I also have a OS Speed, so that's saying something.

Now I'm looking at the possibility of acquiring a Go gx7r, since somebody is offering one to me. Its almost new and is very cheap. It was broken in in front of me so I know it's in great condition. The former owner just finds that it consumes fuel a bit too much. Granted it's still probably about less than 50 tanks old.

What are your experiences? Thanks!