Ah ok. So now there are three (four?) completely different products branded as "Visual Studio"? 1. The original, real Visual Studio for Windows, 2. Visual Studio Code (a fork of atom?), 3. Visual Studio for Mac, (4. Visual Studio Express?)
VS Code uses electron, but is not a fork of atom... It's actually very fast and fairly nice.. the ui started similar to atom, though I wish I could take back my request for tabs support and go back to the non tabs ui.
This Mac version is a rebadge of Xamerin Studio, with some redesign and tooling improvements.
VS Express is really a stripped down version of VS, and the community edition is usually a better option.