When comparing Musique vs gmusicbrowser, the Slant community recommends Musique for most people. In the question“What are the best audio players for Linux?” Musique is ranked 10th while gmusicbrowser is ranked 21st.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Can handle very large local music libraries
Pro Minimal UI
The UI for Musique is pretty minimal. By not throwing every option in the book into the application, the developers are able to keep the interface clear of any clutter.
Pro Consistent queue simplifies what's playing next
There is a queue on the right side of the player, which shows you what is coming up next. This makes it easy to add a new song or remove a song before it plays to be sure that you/your guests stay in the groove. You can also slowly transition to different genres, not to mention plan ahead and adapt as you need to.
Pro Great with large libraries
This program uses a tagging system to help you find the music you're looking for, and can even help find duplicates. It will also automatically sync with a folder, meaning you don't have to manually initiate a scan.
Pro Cool AutoTagger
The smartest auto tagger out there. It has an intelligent regular expression system to tag the files based on the filename contents. If the name contains something like Band -Album - Track -Title www.download.mp3, the system lets you filter the metadata fields.
Pro Large assortment of layouts
You can pretty much emulate your favorite media player layout inside of gmusicbrowser as it has a large assortment of pre-made layouts as well as an insurmountable amount of options for custom layouts.
Pro Remembers playing/pause status even after restart
With most other options, you have to start the player, wait a few seconds, then click Play. Gmusicbrowser spares you the wait and plays music automatically upon startup (if you were playing music when you closed it previously).
Pro Intelligent auto playlists
Automatically generated playlists with the criteria you decide. Great for big collections.
Cons
Con No differentation between Album Artist / Track Artist
Albums are sorted via "Album Artist" but each deviating "Track Artist" creates a new album handle. Very bad when you have album tracks where the filename consists of the typical "Artist #1 feat. Artist #2" setting as each of these files creates another album entry.
Con Doesn't resume from last close
Musique won't resume from the last time the app was closed. If you had a great music queue all set up, unfortunately it won't stay there if you close the app.
Con Linux controls don't work
The Linux next/previous buttons don't do anything - you will need to open Musique in order to do anything with it (other than change the volume).
Con It won't install on Linux Mint 21
Con Held back by performance issues
Can be very slow, uses a lot of resources, and has a decent amount of lag when going between songs.
Con Doesn't support media keys
Con Unusual keyboard shortcuts
Space does not pause, for instance. This would have been useful, as hitting the space bar is easier than finding the play/pause button - most music players use the space bar in this fashion.
Con Some plugins are outdated
Several plugins works on older versions of libraries no longer available for recent distros.

Con Poor library management
Initial load may have issue skipping parts of ones library, re-scanning may not resolved the issue. It also may tax ones CPU quite a lot, during these load attempts.
Con No WMA support
For those with older libraries that may still have unconverted WMA files, this can be a non-starter.
Con Large assortment of features and layouts may be confusing
Some people may find all of gmusicbrowsers layout and options daunting to figure out.
