Sex of marginated torts

[Nrc470]

So my one marginated has a long tail and the other has a short tail. Is it safe to say one is a boy and the other is a girl. Let me know your thoughts

 

[KarenSoCal]

So my one marginated has a long tail and the other has a short tail. Is it safe to say one is a boy and the other is a girl. Let me know your thoughts

How old are they?

And if you could post pictures of each...carapace, plastron, and "private parts". If they are old enough someone may be able to help.