Face: Jennifer
Boobs: Carmen
Ass: Jennifer
Overall body shape: Jennifer
Overall "Slut" factor: Carmen
For looks, I pick Jennifer, in spite of her (IMHO) painfully overinflated chest. If they were the size of Carmen's she'd be perfect.
Yet for bedroom antics, I think Carmen would be better at it. More assertive.
Hey, didn't Carmen and Jennifer both do a Playboy photoshoot together once? I think Carmen herself was the photographer.