So I started collecting with the promise I would never get a Rolex. Then about a month ago I bought a Sub-C from BK and I love the thing. I decided I would get another and of course gravitated to the Rolesium. I have read a ton about the SA3135 version and the reliability problems. My question is, is there a difference externally between the SA3135 and ETA2836 versions? I have no intention of ever opening my watch and was wondering if the two are identical other than the insides?