When comparing typora vs Zim, the Slant community recommends Zim for most people. In the question“What is the best cross-platform note-taking app?” Zim is ranked 8th while typora is ranked 13th. The most important reason people chose Zim is:
Notes can contain links to other notes, allowing you to reference important information when needed. This way the user can connect and reference many different pages in the app, keeping things clean and structured, unlike Evernote, which makes this a good Evernote alternative.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Live preview
Typora immediately renders what's typed on the screen in Markdown format. This helps users to have a better understanding of how their document is being formatted.

Pro Hybrid interface
The editor and preview dual-pane setup typical of desktop Markdown editors are gone; instead, a singular interface makes for a WYSIWYG experience. This streamlines the workflow and encourages direct manipulation.

Pro Support for LaTeX expressions
It supports LaTeX expressions, with an easy-to-use MaxJax panel.

Pro Syntax highlight for fenced codes
It supports GFM's code fences, with syntax highlight support for C/C++, java, etc.

Pro Custom theme support
Typora has clean yet beautiful built-in themes and allows for users to create new themes using CSS.

Pro Support for tables
It supports tables for Markdown Extra. And also provides a GUI to make it easy to insert and edit them.

Pro Inline images
It won't display image like 
, But shows the image content inside the editor.
Pro Free during beta
Pro Shows table of contents for the document
It supports an outline for the document, by showing a table of contents on the left side of the screen.
Pro Cross-platform
Currently works on Windows, Mac and Linux.
Pro Natural typing experience
Editing in Markdown, either in WYSIWYG mode or in markdown code mode, feels natural. It never gets in the way.
Pro Make charts and diagrams with Mermaid, FlowChart and Sequence
Use fenced code-blocks to render diagrams using syntax from Mermaid and FlowChart.js.
Pro Sidebar with a list of files
You can open any folder in sidebar and see a list of other markdown files.
Pro Syncs with iCloud
Pro Allows for organized, wiki-style navigation
Notes can contain links to other notes, allowing you to reference important information when needed. This way the user can connect and reference many different pages in the app, keeping things clean and structured, unlike Evernote, which makes this a good Evernote alternative.
Pro Plain text data format rather than proprietary
If/when the app is no longer developed (or if the user simply decides to no longer use the application or view/edit it on a non-supported platform), this can still be done with any plain-text editor.
Pro Automatically manages files and folders
Zim will automatically create a folder structure that fits your page hierarchy and adds/removes files such as images to/from appropriate folders.
Pro Good export options
Zim supports HTML, LaTeX, Pandoc Markdown, and RST. This allows ones documents to be easily used in a wide selection of other apps.
Pro Support for multiple platforms
Windows, Linux, and BSD are supported with their own clients. This is nice for those that use multiple operating systems but still want to use the same app on each.
Cons
Con No mobile (Android/iOS) apps
Con In beta
Typora is still in beta and may be prone to changes or bugs.
Con Unusable image management
Con The immediate rendering of Markdown is hard on the eyes
Having Markdown immediately render causes text to jump into formatted text, which is distracting and hard on the eyes.
Con No portable version (Windows)
You need admin rights on a managed Windows computer to install it. There currently is no portable version available.
Con No mobile app support
This is a desktop app and there are no mobile versions available. This can make it more difficult to use on-the-go if using cloud storage to store files from the app, as there is no mobile app version to access those files.
Con No native sync support
Zim notes don't automatically synchronize with other devices or offer built-in cloud sync support. Of course the user can add the files to Dropbox, or something similar, to then open them on another device with the app installed. But this is more of a work-around than a built-in solution.
Con Looks ancient
Zim has a very plain and outdated interface.
