Aren't the m760 the integrated brake/shifter lever style ones? I've used the xtr versions and they were ok bot won't win a beauty contest.
I think the m750 are practically the same as the m952 in all but colour. Personally I rate the xtr versions, best retro shifters imo. I prefer them to the m739/40s.
If memory serves, once you get to the 770 range, they are dual push shifters, meaning you can both pull and push on one of the levers to get a shift. I thought this would be a gimmick, but found it actually useful. I've got a bike wearing that gear, another the xtr m970, many with m952, nothing else will do for my 9sp builds now, but would happily use m750, and the LX of that era too (550?) and SLX, as it's all quite similar really.