When comparing Texts vs Notable, the Slant community recommends Notable for most people. In the question“What are the best open source Markdown editors for Linux?” Notable is ranked 24th while Texts is ranked 29th. The most important reason people chose Notable is:
Simple tagging support is easy to use, and allows quick searching through multiple documents.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Supports multiple Markdown dialects
Unfortunately, this is a global setting for save (it can open any dialect)

Pro Immediate Markdown rendering and preview
Texts immediately renders the formatted Markdown as you are typing it inside the text box. It's quite similar to a WYSIWYG editor.

Pro Imports and exports many formats
HTML, Word, TeX, PDF, ePUB, OPML.
Pro Works on Mac OS X and Windows
Pro Organize projects with tags
Simple tagging support is easy to use, and allows quick searching through multiple documents.
Pro Simple, clean interface
With a clean UI that lacks clutter, you can get right to work without a bunch of distractions.
Pro Supports markdown
Uses GIt-flavored Markdown, which is a popular and easy to use WYSIWYM format.
Cons
Con Overwrites standard Markdown
Editing a preexisting Markdown document overwrites standard markup in it (for example, interpreting headings marked with leading "#"s and rewriting them with a trailing underscore line), adds extra blank lines between all paragraphs, and adds extra spaces at the head of unordered-list items.
Con Spell checking is not activated by default
There's a built-in spell checker which is not activated by default and is quite hidden.
Con Limited choice of built-in themes
You can download the CSS for these themes and create your own, but would be nice to have more flavors (e.g. GitHub)
Con No word count in older versions
Word count is present in Texts 0.21, at least.
