When comparing Suplemon vs neovim-gtk, the Slant community recommends Suplemon for most people. In the question“What are the best terminal text editors?” Suplemon is ranked 20th while neovim-gtk is ranked 23rd. The most important reason people chose Suplemon is:
Multiple cursors & column selection allow versatile ways of editing.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Native multi cursor editing on the command line
Multiple cursors & column selection allow versatile ways of editing.
Pro Low learning curve
Does not drown you in keyboard shortcuts or non-intuitive use-concepts as you start using it, but high-level functionality can still be easily accessed when the need for it arises.
Pro Mouse support
Scroll wheel works automatically. With mouse mode (F8) the cursor can be moved with a left-click to a desired position, and new cursors can be added with right clicks.
Pro No required dependencies
Pro Shows linting messages for Python code (requires flake8)
Pro Full GTK3 integration
The UI is fully GTK3 compatable, so it themes to match your desktop and the functions are all in expected locations.
Pro Light UI stays out of the way but does provide all expected widgets
The overall UI is very trim and doesn't take up screen space for no reason, but all the expected bits like tabs and popups and even the command line have native widgets.
Pro Support for ligatures
Fonts with ligatures can be used to render code.
Cons

Con No region selection
Some selection features that are taken for granted in other editors are missing here. As they say in their documentation, if you want to copy and paste part of a line, you need to use the mouse to select it and copy with Ctrl + Shift + C.
