Er, I think it depends on personality and whether they are an indoor cat or outdoor cat. Indoor cats may want to see the outside world and will go farther when they go out then outdoor cats who have explored many places. If one cat is more daring and adventurous than the other that one will want to explore more than a shy one.
So, all in all, it does not depend on the gender and we may never know for sure unless someone does a survey.