I also use both the R7 and R6 MK II—not for sports, but for moving critters like butterflies and birds. Although the R6 MK II AF is almost identical in design to the R7, it yields slightly more sharp keepers for me. I'm guessing the 32.5 MP CMOS of the R7 simply shows AF defects more readily than the 24 MP of the R6 MK II. With that said—save for low light and wide angle—I reach for the R7 most of the time due to the faster FPS, reach, and room to crop. Both cameras will have a long learning curve coming from the 60D, requiring lots of experimentation to dial in the right AF customization for your style of shooting and subjects. Default AF settings are utter crap. It took me about 3 months of cursing to find what worked for me. Both cameras deliver a lot more keepers than I ever got with my 80D/90D/6D MK II. And, yeah, the R7 needs plenty of NR at high ISO but looks great afterwards.
