its funny you are saying that right now I was just reading about how many fediverse projects are there, I am sure we could get it packaged up for Yunohost if that was a stopper for you...
its very different. I would recommend signing up to instances of both and playing around with them to get a hang of it. I really don't like the design of mobilizon I think they made a lot of confusing decisions
I would recommend Gancio instead of Mobilizon to be honest. Its also fediverse event software but designed quite different. You can see a pretty active server of it here https://bcn.convoca.la
