Both Bichon and Loschbour have some of the Aurignacian-magdalenian (Goyet type) ancestry along with some ANE as well. They are still mostly Continenza/WHG, but not as good of a proxy as Continenza mesolithic itself.
"sample": "BEL_Loschbour:Average",
"fit": 3.2962,
"ITA_Grotta_Continenza_Meso": 95,
"BEL_GoyetQ116-1": 3.33,
"RUS_AfontovaGora3": 1.67
Interestingly, Loschbour is a little more core-WHG like than Villabruna 1. Lol they could have called it a whole lot of things other than the "Villabruna cluster".
I don't have access to Bichon, but it has more of the Aurignacian-Magdalenian type ancestry than Loschbour does as per the "Survival of late Pleistocene hunter-gatherer ancestry in the Iberian peninsula". I'd wager than Loschbour and Continenza mesolithic are better approximations for the main ancestral component of the "Villabruna cluster" than Villabruna 1 and Bichon samples are.