Back on topic here, OMAP 3630 vs Hummingbird:
I can't stress this enough: the VAST MAJORITY of comments comparing these two processors are purely SPECULATION. There are videos out showing bits and pieces of each of these phones, but it's unlikely that their are running the fully tweaked and optimized software that they will be running at release.
There are some benchmark results out there, but I believe that these are subject to the issue listed above. Furthermore, a lot of the benchmark results we've heard about do not specifically describe what they're testing. The quadrant benchmark for example runs tests on a number of different things and then lumps everything together into one big score that really doesn't tell us a whole lot for sure: it implies that the phone is powerful, but doesn't break it down for us. (As a side note, the paid version of the quadrant benchmarker which isn't yet released will show the breakdown which will include CPU and GPU performance I believe).
If I'm wrong about any of this please correct me b/c I obviously can't read everything and may have missed something.
If not, then please realize that further discussion of this topic is likely to be largely speculative until these phones have been released for sale to the public.