Dauphine. I have and love PM but I can’t help worry about the potential what ifs with the bag. The main cause of concern being the front flap isn’t lined underneath which caused cracking after few months or years of use. Mini Dauphine on the other hand I believe is microfiber lined throughout including the flap. I would worry less with cracking canvas. Glazing issues with either is much easier to take care than the cracked canvas problems.
Again I absolutely love both and would recommend PM but if choice is one I would go for Dauphine.