(Perl5, by the way?)
For that matter, for "X is to Y what Scheme is to Common Lisp", I'm finding it hard to find a good X, Y that would be satisfying and enlightening.
In fact, many Perl developers where saying things like, “Ruby until Perl 6” not long ago. The difference between two (i.e. Ruby and Perl and similarly Scheme and Common Lisp) IMHO is that Ruby has as an additional goal of wanting to be simple and elegant (which I would say similar to Scheme in contrast to CL).
Whereas, the aesthetic Perl has always been after was programmer productivity and happiness even at the expense of having the capacity to look like line noise. As a result it’s got everything and the kitchen sink sometimes at the expense of apparent elegance (which seems similar to CL in contrast to Scheme).