Radicle contributor here.

It's the same project. radicle.dev is for the protocol, radicle.network is for the network explorer.

Note that that radicle.network is a static site that you can also self host: https://radicle.network/nodes/rosa.radicle.network/rad:z4V1s...

I'm pretty sure that's the same project.

I assumed they are the same :-O

One seems to be built on top of the other? Very confusing though, I agree.