Personality-wise, Wonder Woman still takes the cake. Catwoman has this crazy look in her eye that can tell you to not mess with her, which is a great thing - but Wonder Woman can how her fury through her eyes also. "Hell hath no fury like a woman scorned" - and that woman just happens to be a demigoddess that can throw a small punch into the wall next to her and completely break down a building.
Also, personality-wise, Wonder Woman is strong, confident and brave - while sometimes she may be a bit arrogant (referring to the JLA animation), her personality still shines brighter than Catwoman's.
Not to say that Catwoman doesn't have a good personality. I thought her giving up the dangerous life of living as a cat burglar for her child was something admirable; her seriousness and attention for her daughter was too.
But if Wonder Woman ever has a child, she would do the same - it's unlikely she'll give up fighting crime, but if push ever comes to shove, she just might.