At very most it bares some similarities to "Cockiness", it is literally nothing like "Bandz A Make Her Dance" (of which "Pour It Up" is pretty much a remix or answer version), besides being more of less the same genre and being sung by black folks.
When Beyonce being a sex kitten it's praised to the highest of the highest, round table discussions, world news. It's viewed as being a modern feminism and being powerful.
When Rihanna try's, she's called a hoe, **** and bad role model.
There's a big difference.
The fact that you think it's funny that Rihanna called a ho, ****, and bad role model shows you obviously don't give two ***** about feminism unless it has to do with people praising Bey for it so why are you even bringing it up?