How do you tell the difference between convergens & divergens?

The terminal line is just slightly undulating in D. convergens. It is much more wavy in D. divergens. Compare to the picture of D. divergens here: https://bugguide.net/node/view/2178102/bgimage.

Also the area between the subterminal line and terminal line is wider in D. divergens than in D. convergens.

They are almost the same, but check the shape of the AM line, near the inner margin. Drasteria divergens has a double-hump and Drasteria convergens has a single-hump at that same position. There may be other differences that I haven't noticed yet.
You are adding lots of great shots of this genus. So, please keep at it. If I cannot give you an ID, don't worry. Jan goes through these images every once in a while and he knows them much better that I do.

This is very helpful, thanks! I never noticed that double hump/cleft & it certainly is obvious. I actually was leaning toward convergens not because of that cleft since I didn’t notice it, but the curve/shape of the AM line on either side of the center seemed to not drop down as far as on divergens, it was more “level” if that makes sense. I’m trying to figure things out before I submit so your explanations are invaluable to me. Thanks again & Happy New Year!