The two tanks are the Phoebe Silk tank and the Shea Tee.
I got both tops in size S, which seems to be the right size. I really like the design of the Phoebe silk tank, with the cutout details and double layered look. But I think the neckline is kind of high and the cut around the waist is not particularly flattering. However, tucking the front into a skirt or pants does make it look better because it's not as ballooned out. I got it for $49 which is not super cheap, so I'm considering returning. But I might just end up keeping it!
Anyway, kind of a fun top though! But I think between the two, if I were to keep one, I would keep the silk one.