Oh snap yea, sorry I focused on the 7700k vs 6700k when I viewed the sheet. For my money the 7700 wins out. Cheaper price, 65w vs 91w, benchmarks showing comparable performance. In any case I’m sure you’ll be happy either way.
The caveat being if you even planned on tinkering with an overclock. But if you are power cost sensitive I think you probably aren’t interested.