VS Code is a code editor. It has IntelliSense (not text-matched autocomplete, IntelliSense), debugging support, git integration, parameter hints, go to definition, code peek, etc. (http://code.visualstudio.com/docs/editor/editingevolved). The goal is to give you code editing features with the speed and simplicity of a text editor.
They're both free and lightweight, so I use them both pretty much daily.