UPDATE!
I went to the store and tried on both sizes today and here is what I came back with...spoiler alert...I bought one(!) but I still need help deciding which size is better...
(for reference I'm 5'8)
pic 1 - Mini with both the guitar strap and the leather strap (guitar strap can be adjusted to be quite long)
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pic 2 - Mini with leather strap on a longer setting(Left-can't remember if it was the longest) and the
shortest setting(Right)
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pic 3 - Small (or Regular) on the longest setting
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pic 4- Small on the Left; Mini on the Right
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And here are the Pros and Cons imo...
Mini Pros: 2 removable straps; much roomier than expected. I can easily fit my phone (iPhone XR w/ a chunky OtterBox case), a small wallet (although the SA was able to fit a long wallet in there), LV 6key holder plus room for more small items like lip balm, hand lotion, sanitizer etc and maybe even a small sunglasses case; more length options on both straps especially when you might need to wear the bag crossbody over a thick winter coat
Mini Cons: lining isn't as luxurious as the Small (Small has suede lining whereas the Mini has linen-like lining); no compartments inside but personally I feel like this allows the bag to carry more which is a good thing
Small Pros: basically all the opposite of all the Mini's Cons
Small Cons: strap length setting is limited and non-removable and as I mentioned in my previous post, I worry the leather-wrapped -around-metal method of attachment will cause the leather to wear off and possibly break eventually; the snap buttons on the strap can be caught on long hair (it did on mine when I was trying the bag on); although the bag has multiple compartments on the inside it does not seem to fit more other than fitting something longer (width wise)
Now I'm happy to live with all the Cons in the Small if that's the one I go with as it is the size I originally wanted (plus I have a lot of mini size bags) but the Mini is just soooo precious and will also be practical for my needs so what do you think? Help a gal out here. TY