Generally, a MS Pro is very hard to open, I would say, almost impossible without damaging or destroying the wood housing. Secondly, a cheaper SR60/80/125 etc. or a MS1 system would sound like ass in a MS Pro wood vincinity, as the smaller models need that tubeish plastic construct around them to sound right. Consequently, it is not very likely that you've been robbed with fake systems. I think the missing dot has rather to do with american industry culture, it has simply been forgotten. That does not mean necessarily that you have a bad sounding model. The dot with my MS Pro systems didn't survive the shipping procedures (I needed exchange systems after getting metal dust into it), and it sounds top notch. Furthermore, Noxter & me made examinations about that stuff on basis of our MS1, the differences between "with dot" and "without" were nonexisting.
If your MS Pro sounds different or weird, it has rather to do with quality spreads IMO. All manufacturers have issues with that (even AKG and Sennheiser). I've listened to lots of identical HPs side by side on meetings (e.g. K701, DT880), and the sound differences were astonishing. But worst of all in that respect were the Gradessandro beasts, I fear to say. So if you got a bad sounding model, get rid of it. But wait until you've made the MS1000/MS PRO Ulti mod completely, we had synergy cases of mediocre sounding stock models which sounded better than all others after the mod had been applied. If you don't get such a synergy wonder, sell them.
In respect of that special recording you mentioned, maybe it's the recording that is bad, and your other gear was just too polite. A MS Pro has much better detailling abilities than a SR125...