Here is a PDF document comparing web2py to Django, PHP, Pylons, Turbogears, J2EE and Cakephp
http://mdp.cti.depaul.edu/examples/static/web2py_vs_others.p...
http://mdp.cti.depaul.edu/examples/static/web2py_vs_others.p...
However web2py look pretty interesting, I think I will definitely give it a try.