Good question. One would expect Mini’s download size to be smaller, but no. Non mini doesn’t use much RAM either. So maybe it’s different features, IDK.
What happened to mupdf full version? My guess is both are now minis, with slight differences. I read PDF with “full” but lack of text copy can be annoying.
“This is a minimalist version of the MuPDF app, which focuses on reading only. It
does not support editing annotations or filling out forms.”
Well, neither does “MuPDF Viewer”. So the question still stands.
They each have their own Git repository, but the source code looks very similar.