This question already has an answer here:
After the news about the release of the new entry-level SL3, I got to wondering in which cases would someone go for the twice the price 7DmkII?
As far as I can tell, the 7D can burst faster (10 x 5 fps) and has GPS, but loses or ties with the SL3 in pretty much everything else, and the DIGIC 6 versus 8 might lead to a gigantic difference too.
Am I missing anything in this comparison?
Edit: Please note that I'm aware that the 7D is theoretically "better", as in better constructed, better materials, more direct control of the configurations, etc, in line with pro bodies. It is not a generic "old pro vs new consumer" (which is not covered by the suggested QA either), but rather a concrete instantiation of that generic problem, considering those two models.