Choosing an engine

For a few years now I've been world building and developing systems for use in a mud. Now I want to start putting that mud together and I'm choosing an engine to start with. Evennia looks really good, I've read a lot about python and played on python based muds and mud clients. Even though Evennia doesn't have much out of the box, it remains on the list. I have a little Java familiarity (like very little, next to none) so I think coffeemud looks like a good choice as well.

I also have an interest in unity development, and I realize that's mostly c#. Since this is mostly a hobby, I want to maximize my efficiency. Would coffeemud development be better than evennia for the similarities between Java and c#?