When comparing qpdfview vs mupdf, the Slant community recommends qpdfview for most people. In the question“What are the best PDF viewers for Linux?” qpdfview is ranked 5th while mupdf is ranked 6th.
Ranked in these QuestionsQuestion Ranking
Pro Low on resources
Pro Open multiple pdfs in tabs
qpdfview is a tabbed document viewer.
Pro Scale, rotate and fit
Pro Allows for some scripting
Opens files in named instances, open files on designated page.
Calling of userscripts on a document is thus far not possible.
Pro Supports Thumbnail Preview
Pro DjVu Support
Pro Add highlights and text annotations
Pro Switch Tabs with Keyboard Shortcuts
Pro Reloads on changes instantly
Pro Custom background colors
Pro Dark mode
However only inverted colors.
Pro Fast search in all opened files
Pro Continuous and multiple-page layouts
Pro Outline, properties and thumbnail panes
Pro Fullscreen and presentation views
Pro PostScript Support
it is available on any major computer OS
Pro Supports TOC-Sidebar
Pro Deactivation of GUI elements
Pro Input forms are editable
Pro Annotation capability
With mupdf-gl, you can do most of the annotations and comments.
Pro Super fast
It was written in C and opengl, so your hardware was used fully.
Pro Vim-mode shortcut keys
Super easy to use with rapid response.
Con No multiple mapping of commands
Having two key mappings to execute the moveUp command doesn't seem to be possible.
Con Configuration intended via GUI
There is no explicit documentation of configuration parameters used in qpdfview.conf and shortcuts.conf (those are the most important ones). However the files are editable conveniently, which is of value.