The difference is as said not noticable, except for the fact that the caseback is slightly thicker then the gen to make room for the movement but can be shaved down a bit for more gen like look.
But on the otherhand no one will ever notice, had a client in the other day that is a huge AP fan and told me how lucky I was to own one and how great it is.
I handed it to him and he tried it on and were really impressed, up till then I had not told him it was a rep, when I told him he didn´t belive me.
That´s how good it is
Just buy the
sec@12 version and enjoy one of the best reps out there and get a APbands or KHtan hornback strap and you got a true keeper!
/J