1.1.1 remedies a security issue in 1.1 (
http://www.djangoproject.com/
weblog/2009/oct/09/security/), so while technically the two versions
are different, there's no reason to run any 1.1 release other than
1.1.1.
As for whether 1.0 (which was patched at the same time to 1.0.4) or
1.1 is better, 1.1 includes several features not in 1.0. You can find
details in the release notes (
http://docs.djangoproject.com/en/dev/
releases/1.1/), but some of these include new capabilities within the
admin, additional QuerySet methods (e.g., deferred fields, aggregate
queries and annotations) and URL namespaces.
HTH,
Justin