> https://git.naxdy.org/Mirror/Ryujinx/ (5 minutes ago)
> https://github.com/Synthlight/Ryujinx (13 hours ago)
Also https://github.com/IsaacMarovitz/Ryujinx. These three are identical repos as of now.
ELI5 guide to diffing git repos:
$ git clone <repo1_url>
$ git remote add -f b <repo2_url>
$ git diff master remotes/b/master
No output indicates no diff. If you need to compare again at a later point, `git remote update` will update both repos.