The 2013/14 decklid has the same dimensions as the 2010/11/12, and the same hump under the faux gas cap, but it adds two rows of holes for the factory decklid panel. The 2013/14 panel can be mounted to a 2010/11/12 if you remove the tabs that align with the holes in the decklid.
Here's a picture I saved from either this forum or some other: Attachment 274010
And here's one of the 2013/14 panel on a 2010/11/12 car: Attachment 274018
That's not a hump ^^ My '14 actually HAS a hump in that spot - the circle extends out from the panel itself. It's not recessed as shown above on the '10-'12s.
I found out the hard way because I ordered a CDC rear panel, being assured by a vendor it would fit. Well things line up fine, but I have a 3/4" high bump/hump to deal with. Their suggestion? Cut it out. I guess that was their idea of fitting. They would do nothing for me in the way of a refund, so I sold it to a buddy with an '11.