This thread has already existed for 7 days and (luckily) I hadn't noticed it until now.
Anyway... I'll give you a decent answer...
I don't know!
This answer is followed by another question...
Why don't I know?
to which the following answer can be given...
I'm not a female (or male for that matter) pornstar!
However, it's likely that some female pornstars will prefer cock A whereas others will prefer cock B, just like there are men who prefer hairy pussy A and others will prefer hairless pussy B. Some men prefer huge tits and others small tits,. Some men active girls, whereas others prefer girls who lie on bed as if they're dead (haven't met many of those guys though...). Some men prefer tight pussies and don't care about the looks and others are exactly the other way around...
Not taking into account that all of these examples are rather superficial and that women may look at other things when they're fucking (things that have nothing to do with cocks at all)... I'd say that women are as diverse as men and that this question cannot be properly answered.
Also since female pornstar A has never met male pornstar B and female pornstar B has never met male pornstar A, it's kinda hard to make a comparisson.
now the summary :
This is a rather silly (and I'm being rather mild right now) and unanswerable question!