Is Python (Django) experience professionaly comparable to Ruby on Rails?
I can't speak for all organizations, but as a hiring manager where I work, yes.  I am really interested in experience with MVC in general.  The specific technology / framework doesn't concern me as much as the fact that you understand what a model/view/controller framework is good for, and when to use it.  
That said, if I see RoR and Python/Django, I'm probably going to pigeon-hole you as a front-end developer and push you towards the web apps division as opposed to our infrastructure division.
I ask this because there seems to be a few more jobs available (at least by telecommute) in RoR. If an employer sees significant Python/Django experience on a resume, would it be plausible to believe that the developer would be able quickly learn Rails?