Both inner demons would have different stats advantages/disadvantages
succubus death knight: Higher charisma? More intelligence, lower con?
male demon death knight: strength? Higher con, lower int.?
In <img src="/ubbthreads/images/graemlins/div.gif" alt="" /> the female character used to have different starting stats as the male character at a certain point in development.
This did not make it to the final game because during beta testing they got a lot of negative feedback about this.
In my opinion the different stats will only be effective if they make a real difference. So that having a higher charisma or a higher intelligence actually is a big deal and can be compared as equal to the loss of combat abilities.