The reason for the price difference for other colours is due to how many units the supplier of Digitec/Galaxus has in stock. For example, if the supplier has 10,000 units in black and 2,000 units in white, Digitec/Galaxus will lower the price of the black model but keep the original price of the white model. Is that clear?
I think this device is glued, so everything on the display. It's probably not possible to change it. You can still buy the Oppo Reno 2. Almost the same with a slightly larger display.