Holga 135BC or Holga Mini?

Help!
I’m an avid Lomo/Holga fan. Since beginning my obsession with medium format cameras I’ve moved to my small hometown and don’t have access to a place for development or purchase of the film.
I’m looking at buying either a Holga 135BC or a Diana Mini so I can use 35mm and don’t have to spend a fortune on film and processing.
But which one do I choose?!?
My favorite subjects are people. I care about the nuances like light leaks, saturation, and a bit of vignetting. I won’t always be shooting outdoors. I like the square format, will I be getting that with these?
Thanks, shutterjellies.