There are a bunch of research papers that compare Wikipedia and Grokipedia in some depth, and they've found and interpreted a lot of interesting differences. A couple of recaps from the Wikipedia Signpost, which is the internal newsletter for Wikipedians:

2026-03-10: https://en.wikipedia.org/wiki/Wikipedia:Wikipedia_Signpost/2...

2026-01-15: https://en.wikipedia.org/wiki/Wikipedia:Wikipedia_Signpost/2...