Can someone enlight me on various tramp releases?

[Paul Lew]

I used tramp years ago and recently just start using it again and I
have upgraded from 2.0.2.6 to 2.95.  This 2.95 use different file
format like:

       /address@hidden/path/name

Now just found out that 2.1.3 show up on ftp.gnu.org and this use the
old syntax:

        /address@hidden:/path/name

So is the 2.95 an orphan branch or a spin-off?  Which one do you
recommend to use?   TIA.