According to my information, there is one model with RGB and one with red illumination. According to the manufacturer's number, it is the latter. As far as I know, there is no CH layout for the RGB model (yet).

It can shine in all conceivable colours. You can configure almost everything with the auxiliary programme (https://www.asus.com/ch-de/ROG-Republic-Of-Gamers/ROG-GK2000-Horus-Mechanical-Gaming-Keyboard/HelpDesk_Download/). If that helps you.

No, in contrast to the G710 from Logitech, it's even quieter, as long as you don't hit it.

We currently only have these keyboards with the Cherry MX https://www.digitec.ch/de/Search?q=Cherry+MX+Brown&take=66