Lynx lynx subspecies ID (Lincoln Park Zoo, 2017)

They do look more heavily spotted than the typical Siberian (which is most common in USA). However I don't think anyone can say for sure unless they know exactly where they came from. Someone on here may know but your best bet is likely to contact the zoo curator.

I suspect either non-subspecific or nominate - they don't look quite spotty enough for Carpathian.