I have both an A6000 and an A7. I am a Sony user, I have also had an RX 1 and an Rx 100. Currently I am using a legacy Leica Summaron 35 f3.5 on both the a6ooo and the a7. I get good results with both.
Check my Web site: james_preisch.blogspot.com
my question is why do the center crops from the a6000 look better than the a7? I would have expected different results.