From what I saw recently about a JK owner wanting the new wheel you have to get an 11+ JK or KK steering wheel. Both airbags should be the same. It's the grand cherokee that is different. I think the owner said he had to modify the wires for the horn to work, and the steering controls wouldn't work because they need to have the cpu flashed by a dealer, and a dealer couldn't flash it with software from a different year.
I'll see if I can find the link. I was only looking at it because I was thinking about buying my cousin's JKU, but wanted the newer interior and wasn't sure if it was possible to retrofit everything.
Found it! It's for a JK, so take it all with a grain of salt. I just can't see it being different to go the other way.