When comparing Xournal++ vs Trilium Notes, the Slant community recommends Trilium Notes for most people. In the question“What are the best note taking apps for UNIX-like systems?” Trilium Notes is ranked 12th while Xournal++ is ranked 15th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Advanced PDF annotation tools
Fill shape functionality, shape drawing (line, arrow, circle, rect, spline), shape resizing and rotation.
Pro Supports pen input from devices such as Wacom tablets
Pro LaTeX support (requires a working LaTeX install)
Pro PDF, PNG export
PDF Export (with and without paper style);
PNG Export (with and without transparent background)
Pro Grid and rotation snapping
Pro SUPPORT
Pro Plugins using LUA scripting
Pro Audio recording and playback alongside with handwritten notes
Pro Note encryption
Pro Free and open source software
Pro Excellent WYSIWYG interface
Pro Attributes that can be assigned to nodes and inherited
Pro Graph of node connectivity
Pro Note versioning
Pro Synchronization with a server
You can set up synchronization but you need a server to do this.
Pro Database storage rather than files
This enables the tool to do a lot of things that would be difficult with plain text file storage.
Pro Archival functionality
Cons
Con Interface can be confusing
There is a fair amount of flexibility to the interface but it can also become confusing, especially when some parts are not necessarily simple to use. Most of the basic features nevertheless are intuitive.
Con Database storage rather than files
This makes it a little less simple to work with (also has benefits).
Con Not markdown
It will import and export markdown but it does not store content as markdown. This isn't necessarily a problem if you don't need it.
Con Synchronization requires use of Trilium's sync server
This can be problematic to set up unless you have a web server that will support the requirements of this.