Why does the topic of this thread mention Stam instead of Carolyn?
In any case, this is a difficult choice.
Bayswater is a classic, although some may think it is a little bit dull. In Darwin leather, like in the picture above, the bag is more unstructured and a bit slouchy.
In contrast, the patchwork style of MJ Carolyn is more of-the-moment. However, the shape of the bag resembles many classic bags, for example Bayswater and LV Alma. Due to the stiffness of patchwork, this bag is certainly more structured than Bayswater. The leather in patchwork is a little wrinkled in nature, i.e., it has a certain distressed look.
I personally own both Bayswater and MJ little Stam in patchwork. Out of these two options in your pictures, I would choose MJ Carolyn, partly because of the reason that I like patchwork, partly because I am not so fond of non-structured bags.