ParenScript (or CoffeeScript) is not the same as ClojureScript. ParenScript "transforms" a subset of CL to JS, while ClojureScript is a full-fledged target runtime for Clojure. For example, something like

  (parenscript:ps (defun square (x) (* x n))) ;; [sic]

will compile fine to "incorrect" JS code. Try doing the same in ClojureScript, you'll get an error/warning from the compiler. This applies to CoffeeScript, etc. as well.

Update - To summarise, ClojureScript is to Clojure what ABCL is to Common Lisp.