Ooh the YSL mini does look like a great alternative for the same look as the Marmont, with better aesthetics and proportions. I don’t own any YSL but I have to admit that some of their items have surprisingly caught my eye in recent times. Coincidence or maybe just that all YSL was terrible under Hedi Slimane and his successor has more talent.
Anyway... I could totally get on board with the YSL over the small Marmont (that is, if you really must not get the Soho Disco, which is perfect, if you don’t require hardware.) Bag shopping is hard indeed, but it’s easy when the right one finally speaks to you.