Haven't heard of the XP line before. I thought the RC on the blade after the number meant it had been rockwell tested. The White Hunter had the dot but can't remember where it was now. Did you go to the Brisbane show? I didn't know about it until it was over.
No, I didn't know of the knife show. The xp series seems to be relatively new , maybe released in the last year or so with only a few reviews in the german language. It seems to be a well made knife.