For anyone curious why they should choose one over the other:
Unfortunately, seems like this is Forgejo's best suggestion on how to compare the two: https://i.imgur.com/j1665QR.png. Not sure that page helps much if you're not already bought in to a free-software-absolutist mindset
I wish they had an actual feature comparison list. I've been trying to find anyone who can give me a list of non-trivial differences between the two; so far it's always either FUD about Gitea's governance and security structure or ForgeFed. The former has made me rather wary of the project[0] and the latter has been stagnate for years and I'm no longer convinced anything will come from it. Otherwise it's just silence.
Personally I thought Forgejo was doing better work on their actions runner for a while from casual changelog browsing but Gitea's been putting a lot of work into theirs. Otherwise it mostly still looks like a soft-fork in practice to me.
[0] Not that I'm thrilled with Gitea's semi-open-core setup and company but they make it seem like they're kicking puppies and dangling features over non-enterprise users head before snatching them away.
Of course forgejo is going to recommend forgejo; a "comparison" article from them is an ad, nothing more or less.
They might still be the better choice. I don't know. But this isn't a reliable source for an actual honest comparison of two competing products.