Yes, to my knowledge, all ProMasters have the same electronic safety systems (ABS, ESP, brake-lock differential, etc.); perhaps they have subtle software tuning differences based on WB and whether 1500, 2500, 3500, but that is at the engineering level. These systems are not even optional; they are all standard.
I wouldn't trust any dealer's listing of any vehicle features. They often don't know and don't care about getting the details right; or they mix up one vehicle model with the next. (BTW, This is not a comment on RAM dealers; I mean ANY car/truck dealers.). I would only accept as credible information found in OEM-level sales and marketing literature (And even they occasionally contain errors), or in the best case, stuff printed on the window sticker of the vehicle you are considering (and make sure the sticker VIN and vehicle VIN agree).
As an aside, I'd like to see ProMasters offer (as options, at least) some of the "advanced driver-assistance systems" (e.g., blind-spot monitoring, lane-keeping assist, active cruise-control) that are showing up on Sprinter and others.