Hi Anto_123. I have just researched the matter. The cheaper model is a refresh of the G903 with a better sensor. The new sensor affects the maximum DPI setting as well as the battery life, see here: https://www.techspot.com/news/80476-logitech-g-series-gaming-mice-get-hero-treatment.html
Logitech offers spare parts for sale on their website: https://support.logi.com/hc/de-ch/articles/360025250474--Ersatzteile-Kabelgebundene-Kabellose-Gaming-Maus-G903
You can also contact digitec directly and ask if they can organise a replacement for you:
https://helpcenter.digitec.ch/hc/de/requests/new?ticket_form_id=39231
Hello,
The G903 has a button under the mouse that allows you to switch between the 5 hardware profiles, which you can change with the software only, but the software is not necessary to switch afterwards (only test done by killing the logitech app, not tested under another OS).
According to my information, the new Hero models are about to be released and can already be pre-ordered from Logitech itself: https://www.logitechg.com/de-ch/products/gaming-mice/g903-hero-wireless-gaming-mouse.html
PS: As soon as the products are available, they will definitely be added to the range at Digitec.