What is the difference between these two PS4 DualShock 4 controllers?

Except for the color.

https://www.mueller.de/p/wireless-controller-dualshock-4-camouflage-339237/

https://www.mueller.de/p/wireless-controller-dualshock-schwarz-playstation-4-509401/

Nothing just the color

Does that mean that only the color makes the controller 10 euro more expensive?

The color makes it more expensive

Yes

Yes