Purpose of having radicale besides radicale2?

Hi there,

I'm thinking of installing radicale as shared calender in my local network. I noticed there are two version of radicale available in the repository. Is there any reason to choose radicale over radicale2?

And another question: Since radicale requires Python, I wonder if running radicale on a router is a good idea in terms of performance and disk space (I have no external storage attached). Did anyone ever tried this?