I'd say there is a wildcat mix or Persian blood
Wow! Those ears are huge for their face. I don't know of a domestic breed that has ears with that large of proportion to face. The eyes look Persian to me. Years ago, I had a White Persian I crossed with a Bengal female. The kittens were gorgeous. All were shorthaired, with the chisselled face of the bengel, though the big copper eyes on all came from the Persian. The eyes on these wildcat kittens remind me strongly of Persian eyes, which are bigger proportionately to their face than other cats.