Various Silverblue (updates/testing) remotes?

ostree remote refs fedora gives a list of options including:

fedora:fedora/34/x86_64/silverblue
fedora:fedora/34/x86_64/testing/silverblue
fedora:fedora/34/x86_64/updates/silverblue
fedora:fedora/35/x86_64/silverblue
fedora:fedora/35/x86_64/testing/silverblue

I understand the others but I dont know about updates/silverblue and how this is different from just /silverblue? I assume updates are normally applied to the normal silverblue remote because we all receive updates?

Are testing/silverblue silverblue with the testing repositories enabled?

I don’t have a complete answer to this question yet. I will take a look soon but in the meantime you can try to fetch those refs or rebase to them and compare the packages included with rpm-ostree db diff/list.