https://forgejo.org/compare-to-gitea/

I dunno, some of these are a pretty big deal, in particular:

Gitea repeatedly makes choices that leave Gitea admins exposed to known vulnerabilities during extended periods of time. For instance Gitea spent resources to undergo a SOC2 security audit for its SaaS offering while critical vulnerabilities demanded a new release. Advance notice of security releases is for customers only.

Gitea is developed on github, whereas forgejo is developed on and by codeberg, who use it as their main forge (also mentioned on that page). Someone dogfooding gives me more confidence in the software.