Need arguments for "Python vs. Perl as an OOPL"

[Roy Smith]

I'm working on a prototype of a new application in Python.  At some 
point, if this ever turns into a product, the powers that be will almost 
certainly demand that it be done in Perl.  My job will be to convince 
them otherwise.

The basic design of the application is object oriented.  I've never used 
Perl's OO features, so I'm not in a good position to make a comparison 
of the two languages from an OO point of view.  Can somebody who's done 
OOP in both Python and Perl help me out?

I certainly know why Perl sucks in general, but for this purpose, I need 
to specifically compare the OO features of the two.  I'm looking for 
something more fundamental than "->{} is ugly".