All 11-14 intake manifolds....
...are NOT the same. this information will likely be of no use to anyone as not too many people are swapping one stock intake for another.
However, the earlier intakes (pre-14, as far as I can tell) have different reinforcing ribs than the 14 ones. This change is necessitated by the use of the 15 casting on some 14 engines. The 15 heads have much broader and flatter flanges than the 14 and prior heads so, to use an earlier intake, you need to trim these way back. See photos.
2014 Premium GT, SGM, Brembo, Auto, Tech, Comfort, etc. GT500s, Steeda UCA, VMP auto N/A tune. 100 shot nitrous on BBR tune. Best e/t 11.42 at 120.64
2012 Premium GT, Candy Red, Brembo package, 3.73, MT82, Comfort, Tech, et al. Procal tune, Roush UCA, UMI poly LCA, GT500s, Steeda red bracket, Hoosier 28x10x16 bias drags. Best e/t 11.91 at 115.23 RIP