A good shoe will have lots of rand around the toe, and a snug fit to the heel. New designs in the heel of the rand are always developing. Cupped heels are typically a little looser than the slingshot heel that crams your toes into the toebox. The uppers of climbing shoes are of two types, leather and synthetic material. Leather will stretch and conform better to the shape of your foot.
Synthetic uppers stretch very little and are usually a bit cheaper.
Lining Lining material is used to make the shoe more durable and more comfortable. Lined shoes will wear longer but will stretch a great deal less. Lined shoes will also absorb more moisture and breath less causing a tendency to retain odor more than unlined leather shoes. Take me for an example. I wear a 9.5 street shoe.