We'll need several pictures of your panther standing in profile with their tail as straight out as possible for the best change of identification. How old is your cham?
EDIT: Whoops! Sorry; posted before OP edited to include a photo
Hmm, based on these pictures I can't be sure. can you take pictures with the tail extended? There's some coloration coming in on the head, but it's not unheard of females having some color on the cheeks.