I tried dang's old account (gruseom) expecting to see his dang account listed. Nothing. Tried dang, sctb (a previous admin) was listed as closest match.
You picked a user who posts a massive volume of repeat, template-y comments and found their former colleague who also posted piles of repeat, template-y comments, that being part of both of their jobs.
I wouldn't rely on these results
https://stylometry.net/user?username=gruseom
https://stylometry.net/user?username=dang