2011 they did major interior "refresh" with a nicer looking interior.
2012 the power train was updated with the 3.6 pentastar engine standard and better automatic transmission available.
The suspension and exterior are more or less the same between years. I think they changed the shape of the hardtop in 2011.
The Rubicon option is really worth it, but it really depends on how you use the jeep, and how you plan to mod it. There is a sticky that explains why or why not to get the rubicon.
“Race fans, I had inferred from my one trip to the Brickyard 400, fell into one of two categories: tattooed, shirtless, sewer-mouthed drunks, and their husbands.” - Steve Ruchin