I think the 7 does have better target seperation, but 1/2 or 3/4 is probably splitting hairs.
The 7 has a bigger screen. It’s a MUCH bigger screen. Worth it in my mind. When having a couple windows open the 7 is stilk easy to read. I could see the 6 starting to get a bit cramped.
That said, I’m positive the 6 would catch somebody a lot of fish!