Well, comic book movie thread belongs in comic book movie forum.
While The Avengers provided just pure escapism and entertainment, The Dark Knight Rises imbues a much deeper sense of fulfillment and satisfaction. Another thing is that The Avengers moved between some plot points a little too, I dunno, freely I guess. Left some holes in the narrative that just stick out. The Dark Knight Rises had some, but they didn't stand out as much to me or affect my enjoyment, and they've become less significant or been resolved completely upon further reflection.
Current verdict, The Avengers has been bumped for me with TDKR as top dog. While apples and oranges, TDKR was a friggin awesome orange.