I think if you're a pro and you're looking for a pro body to do paid work and it's your main body of course grab the a7r5 or whatever you think is the best Body out there with a joystick, better EVF, battery life etc.
But if you're like me and you want a little setup that packs a HUGE punch to throw in the daypack when you're hiking or traveling and you want the best IQ for your outstanding little lens collection the a7cR might be better.
But, I just bought one, so, we'll see