My thinking with group EQ on the guitars is that the less I have to fiddle with, the better. I tried to get tones I liked as well as tones that fit together during the tracking phase. Once I had that hashed out, my EQ issues had to do with the guits in the overall mix, not so much the tone between the 2 amps, so group EQ made the most sense with the least work, haha.
Also, the Divinity during tracking didn't sound too far removed from the 6505+, IMO. I ran less gain on the Divinity, and it seem to have more command of the mids than the 6505+ (which seemed to be high mid voiced), and it was definitely clearer and more articulate. Obviously with less gain it could be that way, but even in a band context, it's seems dryer and clearer than the 6505+. They mate well together.