In my opinion the matter is rather simple.
Premium product is the one, where you get some added values and you are ready to pay for it.

As an example I take the Linde hydrostatic drive (it was implemented into the truck in late fifties of XX century) which is such added value.


It gives you smooth control of the traction, costs reduction on brakes, engine gearboxes and general operation of the truck (like forward and reverse drive without need to stop or slow down the truck)
Additionally, only Linde has developed the proven and reliable hydrostatic drive, so even other brands use it. (like Combilift).
Other manufacturers tried to implement their own or some OEM drive (like Jungheinrich tried Rexroth) but failed.

The competitors try to obtain the similar traction abilities of their trucks (like Yale Productivity or Still with its combined IC/electric trucks) but it's still an... emulation.
Many years ago the customers decided to pay for it. And Linde conquered the market. We must remember, that in fifties and sixties the marketing techniques were not so sophisticated as now, so the marketing guys were not so influential.