He has a decent RB looks, he has. The eyes no first rate green, but they ARE greenish. Without papers he is of course shorthaired domestic, blue in color.
But as a look alike? better than average.
Agree with the above - flat nose profile and mauve paw pads. The eyes may get greener as they develop it starts with a green ring around the pupil (which looks right in the photos) .... usually settles when the kitten is about 9 months old. He is beautiful - RB's have destnctive personality traits so have a read up on those too.
My Tom is a mix and yours looks really similar to my guy except his eyes are bright green with a golden ring around them. I bet if you allow it, Klaus will try to eat you out of house and home, too.