This is the version currently on Debian/Sid, with all packages installed (zathura, zathura-ps, zathura-djvu, zathura-cb). I also noticed zathura renders PDF differently (and noticeably slower) compared to mupdf. It does not use mupdf as a backend, instead depending on libpoppler:
Checking around I noticed that Zathura can use mupdf as a backend but this is not enabled in the build currently on Debian/Sid. It is available in e.g. Arch [1] but Debian does not package this part. I'll build it myself and give it a try.