Just to be clear, any well-made 2" lift properly installed by anybody won't effect your warranty.
That said, if you want Mopar and have the extra cash, go Mopar. I don't have that lift, but I expect it would ride somewhat like what you have now but moderately stiffer. You presently have gas shocks and (likely) mid-level coils. You'll be swapping those for another set of gas shocks and taller likely mid- to heavy coils. Should be on the "similar-to-stiffer" spectrum.