When comparing Zim Wiki w/ journal plugin vs Logseq, the Slant community recommends Logseq for most people. In the question“What is the best single-user wiki?” Logseq is ranked 9th while Zim Wiki w/ journal plugin is ranked 12th. The most important reason people chose Logseq is:
Logseq is a privacy-first tool for thought.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Plain text file structure
Pro Write a journal when you want
There are 3 options for writing frequencies: daily, weekly, or monthly. It's great that you can configure it, because not everybody writes a daily journal but because there are set days, you will be more motivated to actually write in your journal on those set days.
Pro Privacy-first
Logseq is a privacy-first tool for thought.
Pro Networked notes
Similar to Roam's technique of letting the notes flow with links to each other.
Pro Local-first software
Every topic is its own flat file. Nothing is better than keeping your data in the file system with an option of git source control or online backup.
https://www.inkandswitch.com/local-first/
Pro Daily journal is capture on Steriods
The daily journal feature allows you to quickly capture disparate topics under today's date and by way of tags make things organized and findable from any topic page.
Pro Open source
Logseq is opensource.
Pro Structured data over willy-nilly formatting
Lots of apps are too graphically flexible in how they allow content to be entered, placed, and formatted. They act like Word when what you want when authoring content is Markdown. Content and semantic structure, not graphical frills.
Pro Org syntax
Logseq support Emacs Org syntax out of the box.
Cons
Con Keyboard-driven editing/navigating is descent but average
It is only because I was a long-time Checkvist user that I say this. Checkvist has keyboard-driven controls which are in a league of their own.
Con Still in Alpha
Logseq is still in Alpha and is under heavy development.