SynapBook vs Zettlr

Using the tree structure, you can structure the content.

It can support pop-up notes which can be used like simple Windows Sticky memo app.

Search-based notes and tree-oriented tree notes are supported separately, so can be used conveniently depending on the purpose.

Basically, it is based on server synchronization, but it can be used offline.

Groups can be folded.

General styles (bold, font size), highlighter and separator line, and more.

Bug fixes and additional new features rolled out frequently.

While many Markdown editors don't offer specific support for a certain type of workflow, or offer features for scientific workflows only, Zettlr offers features that help the writing process of journalists or researchers in the arts and humanities. It's a lot more text-focused than most editors.

While it supports a diverse range of syntax (chart, easy image insert, etc.) found in other editors, the great citation support made it possible to write real articles. Citation from Zotero and Mendeley can be inserted easily which is a huge plus.

This is the best option, still not perfect, there are some bugs like creating / editing tables and resizing images, but the PROS destroy the CONS, easy quotes, WYSIWYM , attachments tab (supports attaching and opening links to any file), table of contents, TAGs, easy hyperlink between files (same as citations), export to many formats (like Word, HTML5, PDF)...