@b0rk I've never had trouble reading `nvim -d $A $B`. Pretty good indication of what's changed (may depend on your color scheme for specifics of rendering), side-by-side, synced scrolling, plus you can use all of vim navigation, if that's something one is familiar with.
@deoxys314 yea that was the first thing I tried, sadly on this particular input `nvim -d` doesn't really help at all for some reason