What do you suppose the differance between miss Fortune and the Mysterious stranger perk is ... on the surface they seem well the same heh.. Du\iffrent weapon ?? or maybe just people wanted a diffrent gender lending them a hand??
I am curious about this myself. Like you say, is it just a change in gender, or does Miss Fortune do something else? Maybe she doesn't attack your enemies but makes them have critical failures when she appears. It would fit with the name (misfortune) and lady luck vibe I get from her.
If it is just a change in gender and she is like the Mysterious Stranger, can you have both at once? Or does taking one perk prevent you from taking the other?
Inquiring minds want to know . . . .