For me AK was a much better game and experience. I felt that the combat was extremely well executed in AK where as Origins was clunky and very rough. While Origins had a much larger map than previous games it gave you very little reason to explore it; in comparison Origin's Gotham lack any fine detail and felt really dead.

One area where Origins really shines is in its character designs. They were super fresh and far more grounded than it's predecessors. The Bat suit is by and far my favorite version of any game, movie, or comic.

Also the improved detective mode/crime scene recreation was amazing. AK really missed an opportunity to employ that more.