2011 is more expensive!
2011 was manufactured AFTER 2010.
If you stand in front of both you wouldn't be able to tell a difference.
If you stand behind both, you will be able to tell.
2011 can come with an extra 145HP if equipped with the magic ZCP.
Some 2011 are equipped with a muscle building feature called "manual seats".
An extra option for interior leather.
That just on top of my head, but as everyone said SEARCH
2011 E92 JB/BL/DCT--->80K Miles
2015 F80 SS/SO/DCT