All cartridges are a compromise. What the 6.5G lets you do is have a small, lightweight package that you can still make hits out to 1200 yards.It didn't do any one thing particularly well. It was ok for a compromise cartridge. I figured for the same price for components, I could reload for a cartridge that could get me out further, and hit harder if I decided to hunt with it.
If one is dead set on hunting with an AR15, it's a fine choice.
6.5CM has more bubblegum but your bringing alot more weight and powder to the table.
FYI I shoot 130gr AR hybrids out of both.