There is zero difference internally between the two. Exterior wise is AMG on the top instead of SRT6 and the little tabs on ours that support the back part of the front engine cover are actually just left over casting sprues they didn't remove. The AMG ones do not have these and you can see where they are machined off. One more thing, if use install the AMG ones, you'll be graced with a nice little talkin' to from Steve (32krazy) about how your car still isn't an AMG. LOL I know this from experience. He's a great guy though and it's truly all in good fun.