The larger one has better proportions and can be worn single or double strap where as the mini can only be worn long on single strap unless you use a chain shortener.
I bought the mini as that was what was available but I much prefer the larger size.
If you see either size and it’s available I would take it as it’s extremely hard to get. I am trying to purchase the larger one and cannot locate it despite having long term SAs in 3 countries including France.