The 3594.50 is identical to the standard Speedmaster Pro except for dial, hands, bezel and case back. I've done a rough Photoshop of the 3594.50 dial and hands on a standard Speedy case and black bezel (ignore the bracelet). Having said that, the steel bezel is my favorite thing about the watch and something I would never want to swap out.
doctored photo
My 3594.50 and its lovely steel bezel