They are not. Some notable differences exist.
As for the "perfect Sub", Rolex makes them. I can get one for anyone interested for about 9K... 5K for watch, 4K for shipping and handling.
If not interested, River, Silix, Josh, Andy, TTK, and the rest of the RWI dealers have the "lesser" versions that 98% of the world won't know the difference; including SOME AD's.