I've only noticed the one but this one was talking to Josephine when I was trying to so that could be why I noticed her. She wasn't just dressed alike the face was alike too right down to the same shade of lipstick the and same eyebrows. Honestly the gal feels less like a character and more like a semi plot device to me and not a very good one.
That's really the problem with Bianca, I feel. Other than her unhealthy relationship with Varric, of course, which we already knew about, even if we didn't know how bad it was. I went into that quest thinking, "Okay, now I wonder what this woman who Varric has pined for all these years is really like," but other than saying she is sort of generically "spunky", I could not describe her personality at all after that quest. It isn't even that I dislike her, she is just so "meh." They didn't give her any depth whatever and just made her "random girl that broke Varric's heart." So yeah, that was my reaction to Varric's companion quest, "meh" and companion quests are often the strong points of the game to me, so that was really disappointing.