Maya, I followed the Macy's size chart which does seem to be accurate. I got the 4p in the Levi's 512, and the 2p in the Ralph Lauren Nolita's. Both fit about the same on me - same rise (not quite 10 inches, maybe 9? I tried them on several weeks ago-). Both need hemming. Both are similar dark wash rinse and pocket size/placement.
I don't need both - I just want one pair, so it's hard to choose. I keep meaning to post pics for the group to weigh in, but ultimately I think they are so similar, it'll boil down to how they wear and which stretches out the least. I have had better luck with RL usually.... BUT the material for this pair seems stretchier which makes me wary.
I just ordered the BR clams (Angie's first link), using a rewards coupon so they were only $49. When I get those, I will take photos and let everyone help me decide which of the three to keep!
DO try either the Levi's or the RL... I think you will like the rise on either.