All PAL genuine 2600s that I've seen use the US spelling of color, it's not just a clone thing. I guess Atari just didn't want to print different panels and the cloners just copied Atari. In programming languages (well in BASIC), the US spelling is always used.
No built in games. The power connector is on the left instead of the middle, it has pressable buttons instead of sliding buttons/switches and the panel is different. I'll open it up and take some more pictures.
Some reasonable prices there but Basketball Nightmare isn't worth $1, let alone $7
Robocop vs Terminator was a great deal. I sold one for $60 a few years ago but checking eBay, it has gone down a lot in value. I guess I just got lucky.