Question about Samsung Galaxy Tab S4

With the Galaxy Tab S4 for 779.- SFr. you can also make phone calls, unlike the S4 for 630.- SFr.
Compare the technical data!

Hm, ok. But the tablet is not available in black either. And it's not worth it for me if I don't know whether I'll get it before my holidays.

I can only explain it by the different material of the paintwork. In any case, the components are exactly the same.
The price is its own thing... no one really knows how they come about. The price of the black model can be seen as "standard" (according to other shops). Maybe the grey one costs less because it is not immediately available and some kind of discount is offered.