Hi there! I'm torn between these two bags. I mentioned in another post that I was having an O/S Muse in purple bought for me, but then I saw the Balenciaga City in the same deep purple shade, so now I'm confused. Can you guys give me your opinions please? I actually love big bags, but I'm afraid that the Muse might be too heavy for me, especially since I have a back problem. Is the Balenciaga City a lot lighter? Help!