NeoBundle vs Spacemacs: What are the differences?

Developers describe NeoBundle as "Next generation Vim package manager". NeoBundle is a next generation Vim plugin manager. This plugin is based on Vundle, but I renamed and added tons of features, while Vundle tends to stay simple. On the other hand, Spacemacs is detailed as "Emacs advanced Kit focused on Evil: The best editor is neither Emacs nor Vim, it's Emacs *and Vim!*". Since version 0.101.0 and later Spacemacs totally abolishes the frontiers between Vim and Emacs. The user can now choose his/her preferred editing style and enjoy all the Spacemacs features Even better, it is possible to dynamically switch between the two styles seamlessly which makes it possible for programmers with different styles to do seat pair programming using the same editor..

NeoBundle and Spacemacs can be primarily classified as "Tools for Text Editors" tools.

Some of the features offered by NeoBundle are:

• Plugin prefixed command name (:Bundle vs :NeoBundle).
• Support for vimproc (asynchronous update/install).
• Support for unite.vim interface (update/install/search).

On the other hand, Spacemacs provides the following key features:

• Batteries Included
• Nice UI
• Excellent ergonomics

NeoBundle and Spacemacs are both open source tools. It seems that Spacemacs with 18.1K GitHub stars and 4.45K forks on GitHub has more adoption than NeoBundle with 2.21K GitHub stars and 169 GitHub forks.