MetaJess

I didn't do any extensive analysis, hence the question mark. Looking at the commits count shows an obviously less stark contrast (6.3 ratio, vs. 353). I looked over his recent contributions, and they seem pretty normal to me.

I think commits are a fine metric baring explicit gaming tactics. You can do a fine-grained analysis of the commit history if you are not okay with this metric. As for pubs, she has 10 and he has 11, both have 2 as first authors (arXiv data).

I wandered through git blames of the code, looks like 70% that achael guy, followed by chi, then michael, then katie. The involved stuff is all achael and michael, all katies changes are tweaking parameters / configs etc.