One of the shoes above is a bespoke Corthay and the other is RTW from the same maker. Which is which? The point of the photo is that the differences between quality RTW and bespoke shoes are subtle unless you're so close that you probably are wearing the shoes. And then, of course, you'd already know the answer.
Corthay probably competes principally with Aubercy for Parisian customers who seek quality. Both make high quality and sometimes attention-getting shoes. Aubercy is a larger company but, to me, Corthay has more soul. His bespoke business is just three pair each week. The bespoke shoes are made in a small workroom next to the showroom.
Pierre Corthay created his signature shape in 1992, and began venturing into adventurous colors at the request of his bespoke customers. Despite all the attention that the colored shoes receive, 90% of his sales remain black and brown.
Oh yes, the brown shoes in the top photo are the bespoke pair.