The premium model is our modern interpretation of a subscription.
So in case you have a subscription like in EVE at one point it is true or false. You either pay or you do NOT play at all.
Even worse, after 30 days (or whatever the trial period is) this happens with Albion Online Silver. So at one point in time you are put to make a decision.
Our premium account is a must for everyone who wants to play on a serious level.
But maybe you buy the game and you dont have time to play the first month a lot and then you are not suddenly kept out of the game.
Or you start slowly and you are not sure yet if you want to keep playing.
So it is a more soft approach on when and if you have to pay.
And like the others said already it is just making you progress significantly faster.
Thats all very pretty but the diff is: premium turn people off, as u can see in this thread. not to mention that not everybody will be paying a monthly fee, only extremelly casual players who cant afford to buy prem with silver or lazy players who cba to farm silver so they buy gold to trade it. So AOSilver doesnt see how thats any different from a cosmetic shop
Anyway, there will be a cosmetic shop in AO at some point as it has already been stated somewhere.