Identical berets can look completely different on one person from the next. Head size, shape, baldness, short or long hair, body shape, etc., etc.
On the web site I often use pictures of myself to give some impression of what a specific beret looks like, or I use a neutral mannequin.
Still, it is not easy to compare the varieties if you don't see them next to each other.
What I did here, is photograph a variety of berets made by Boneteria Auloronesa - all are well broken into and of the same colour. Pictured from top down are a 10 pouces, a 10.5 pouces, an 11 pouces and the 12 pouces Tarte Alpin. Mind: the mannequin has a very small (56) head size, which of course influences the overall look.