[papaf]

I've learnt and used both. Even after programming in Clojure for a year, I'm more productive in Scala because of its familiarity and because there is less of an "impedance mismatch" between Scala and available Java libraries.

However, I would recommend Clojure as the language to learn. The community is very beginner friendly, the language takes me to interesting places and some of the libraries are so elegant they are an absolute pleasure to use.

I believe learning Clojure is a good investment - as it matures more parts of the Java ecosystem will be covered by Clojure libraries, its a good practical way to learn a Lisp (which is worthwhile in itself) and its a good practical way to appreciate Emacs (which is worthwhile too).