I know this post is a bit older, but I'll add my thoughts on the mini. My mini just arrived, geranium lux leather, looks just like the mini in post 3. It's a pretty color, but I am disappointed. The leather is so different from my PS1 med., it is stiffer, the sides and bottom almost feel like they have some kind of structure in there. The top and front of the flap are a little softer than the sides and bottom, but thicker than my PS1. The back and front seem similar to the flap, but it's a bit hard to tell with the pocket in back. There is some texture, it's not smooth and grainy, and no sheen at all as in the pouch in post 3, or Reckfly's purple mini. It is labeled as prod. 2016. (I read another post where someone wanted the 2016 specifically for the leather difference.)
For me, I don't care for this new lux leather. That soft, shiny, smooshy quality is what I loved. I miss the slouchiness, this bag doesn't slouch. This is not the PS1+ calf, but the lux lamb.
When comparing to some RM minis, I would say the RMs are structured, the ones I have anyway. This mini is softer that the RMs, I wouldn't call it structured, but softness and slouch is nothing like the older bags. I'm hoping it will soften up with some use, but I'm not yet sure I'll keep it. Can't compare to a Bal hip, I don't have one.
I have another PS1 med. coming later this week, I'm just hoping it's the older leather. I won't be buying anymore unless I can see them in person.