The shanks are made with a flexible carbon fiber material so the foot can roll through easily from demi-pointe. The 93 model has a lower profile and longer vamp which makes it suitable for those with long toes. The box is a slightly tapered square shape which is actually suitable for many different foot types, but much preferred by those with narrow feet.
The reviews that I have found on the Gamba 93 are 95% positive. The shoe is described as soft, comfortable, and very easy to break in. The Gamba 93 molds well to the dancers foot. The negative aspect of a soft pointe shoe like the Gamba 93 is the shorter lifespan of the shoe, and the fact that a dancer with strong feet would wear them out quickly.