It sounds like they COULD both be male, but it's tough to say from what you've described. Females will make noise when they're upset or annoyed but only males truly croak. My male is about 2 inches long and will croak at youtube videos or when it was still warms outside and we kept windows open the crows would set him off early in the morning. My boyfriend frequently sets him off with his singing and noise-making LOL. But because of the frequent calling My WTF has a darkened throat that looks kind of loose. Do your frogs have throats like that?