I haven't seen the Frankie Bs, but I think Paiges are all hype. I don't know if you've actually tried them on or anything, but I think they look like jeans from the Gap.
I'd get the Frankie B's and see if they work on you. They look really cool and I love weathered dark washes like that. I've tried on Frankie Bs in the past and while most styles are cut super-slim, there are a few with a slightly higher rise. For the record, Frankie B's 3" and 4" rises are only taking into account the zipper measurements. The actual rise is more liek 6" - 7". I think they're about as low as True Religion's rise.
Honestly, I despise Paige jeans (yes I actually despise a jeans designer, what the heck is wrong with me?)... I share Maddie's sentiments completely. I have yet to see a person look really hot in a pair of Paiges.
i've tried paige jeans and i like them, however they are very basic and simple. i've never tried frankie b jeans (just haven't seen any that i like enough to give them a try) but the ones you show are cute. ok i really haven't offered a vote here. . . so i don't know how helpful i am actually being. . . ahhhhhhh i'd go for the paige just because i have some experiance with them. hth