As far as I know, all 777s are different, even the ones owned and operated by the same airline. I visited the cockpits of A6-EBY,ECT and EGM and many more and noticed that they had different configs even the ones that were delivered in the same year. Qatar though uses the same config across all their 77W and 77L fleet. It would be nice though to have more options to change the VC in the 777. Only option there is now in the VC is the clock and ISFD, that's it.
The blue carpet is unrealistic. Only the early 772 used them. I have yet to see a 77W or 77L with blue carpets. American don't even have carpets on their 77W. The overhead panel is quite different too.