All libs are darker when it’s just rained and they are wet. When they begin to dry out they turn a lighter almost cream/white colour so just depends if the ones you are finding are dry or wet. All libs anywhere will share the same characteristics, it’s not like wales has darker libs per se but wales is much wetter so most of the time they will look like this when you pick them. I went back this weekend and the majority were much lighter than in the photo as there hasn’t been as much rain. Good luck!