When I look on Coach's website, it makes me very confused about sizes. The leather Ali is listed as 13x9-3/4x5-3/4. The SIGNATURE Ali is listed at 13x9-1/2x3-1/2 and the Cotton Slim Flap is listed as 13x10-1/4x2. Is the signature really slimmer than the leather Ali? Is the Slim Flap actually taller? I thought all the Alis had the same dimensions and that the only difference on the Slim Flap was how deep it is. Is the leather Slim Flap different yet? I'm trying to decide between a slim flap and an Ali, but the Ali seems so deep that I think it is just plain too big. Anyone have both an Ali and a Slim Flap to compare? Opinions?