Probably 90% of Swiss Made Watches under 3 grand have either an ETA 2824 or variant and those above 3 grand have the 2892. Some have the newer Valgranges. Most chronos have the 7750 or it's variants. A few have the 2894 Even though they come in grades and some outfits "customize" the mvmts they are still the same animal. You can get a Hamilton with a 2824 for $400 and pay 3 grand for another watch with the same basic mvmt with "modifications". The upgrades in the mvmt cost a few bucks but they charge hundreds if not thousands for them. You can buy (or could a few years ago) an Invicta dive watch Swiss made with the ETA 2892 and a COSC certified watch for $900 and this isn't your typical Invicta. The exact same quality in an IWC ot Omega and your looking at well over 3 grand. I find it amazing how these outfits get away with charging what they do for what you get. it shows you how gullible folks are. it's all in the name or maybe the "brand ambassador".
With the changes at ETA they are going to the Stelita mvmts which are basically clones of the ETA models. Many are going with Citizen and Seiko mvmts because they can't get the Swiss anymore. A few outfits are making their own mvmts. Rolex is a different case because they are the 600 lb Gorilla in the Swiss watch Industry. They are rich beyond all avarice and so have the bucks to do everything themselves though I think their prices are outrageous as is their service too.