However, I think there's a reason Python and Ruby have overtaken Perl in the interpreted language space: Python values simpler solutions [1]. Ruby also values a certain type of beauty over Perl.
Clojure/Scala is a similar dichotomy. Scala has everything you might need, while Clojure is rooted in the spartan power lisp provides.
Also, I wonder: if they weren't both JVM languages, would we even be having this type of discussion? I mean, we aren't comparing Clojure to Cobra or D.
[1] See the Zen of Python http://www.python.org/dev/peps/pep-0020/