[Catalyst] use base vs use parent

[Octavian Râşniţă]

Hi,

I've seen some Catalyst sample modules that use "use base" and some others 
that use "use parent".

I know that the recommendation could be to use Moose and "extends...", but 
if Moose is not needed, what's the difference between use parent and use 
base?

When should be "use parent" be used and not "use base" or it really doesn't 
matter which one is used?

Thanks.

Octavian