My most humble opinion is, try them both on...then make your decision based on how the watches feel like on your wrist. Although I don't have an AT, I do own a speedmaster pro with SS bracelet. My thoughts on the differences of that watch compared with my 40mm Milgauss is...they are both different watches. They look, feel and carry differently. I also own a Seiko GS SBGR083 and while it oozes quality and workmanship (I love the watch btw), putting the Rolex on feels like driving a Volvo. Pure solidness...you know you can knock the hell out of that watch and it will keep going. While I don't own a DJII, and I know that the Milgauss a little heavier, in some ways, they are very similar watches...so here is my take...DJII. Omega makes great watches...but Rolex is pure solid-ness and tough-ness...
DC