I don't see Neverwinter Nights Enhanced Edition on the list yet, but I think it fits, too, at least partially.
- Partially because GOG is the only one still giving away Neverwinter Nights Diamond with each purchase, and in that regard GOG customers are actually privileged over those of other stores.
But in all other aspects, if you disregard DRM, GOG users get the short end of the stick:
- The Enhanced Edition frequently gets development builds with fixes and new features on Steam, while GOG does not support them. GOG only gets the official patches, and because of that it took one whole year for all the little fixes and features to finally arrive on GOG last year, while Steam users received constant updates.
- GOG users also had to wait for the new Premium Module DLC Tyrants of the Moonsea, which was released here one month later than on Steam, without any conceivable reason and without Beamdog or GOG giving any explanation for the disparity.
- The latest official patch was released on Steam on Tuesday, and Beamdog said it should arrive on GOG the same day. The next day it was released on Galaxy apparently, but so far, the offline installers are still outdated. Galaxy is not the same as GOG, so for all GOG customers who don't use it there's an unknown delay and no communication about it, once again.
In short, I'd say if you want to play NWN Diamond, GOG is the place to buy it, if you want to play NWN EE, Steam customers are much better off than those who buy it on GOG.