The main improvement of the 7600 over the 760 is how the slide/magazine is isolated from the barrel.
The 760 has threaded holes for aperature sights. The 7600's I've seen don't.
There's a lot more cartridge selections for the 760.
If you shoot off the bench the 760 requires a little more finess.
I like both. I only have bought 7600's in the last twenty years though. (Other than a couple 141's.)
