When comparing Eclipse Che vs qemacs (for quick emacs), the Slant community recommends Eclipse Che for most people. In the question“What are the best open-source text editors for programming?” Eclipse Che is ranked 20th while qemacs (for quick emacs) is ranked 28th. The most important reason people chose Eclipse Che is:
Built-in terminal with root access so you can make changes to your running machines. Being able to SSH into the workspace so you can use a desktop IDE is handy.
Specs
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Pros

Pro SSH + terminal
Built-in terminal with root access so you can make changes to your running machines. Being able to SSH into the workspace so you can use a desktop IDE is handy.

Pro Custom commands
You can package up custom commands with your workspace and then use them (or share them) with everyone else.

Pro Docker runtimes
You can choose from pre-configured environments for Java, Javascript, C++, PHP, C#, etc., or you can define your own by dropping in a Dockerfile - makes it easy for simple and complex projects.
Pro GIT and SVN VCS support
Projects can be easily imported from any Git or Svn repository hosting service.
Pro Reproducible environment

Pro Portable workspaces
The workspace in Che includes project sources, IDE and the runtime. So if you hand your Che workspace definition to another user and they execute it they will get everything they need to build, run and debug the project.
Also the runtime is in a Docker container so it will work even if the second user is on a different OS than the original user who shared their workspace with them.

Pro Previews
Che does a nice job to automatically map the service:port running in the Docker container (e.g. tomcat on 8080) to the Docker port it actually uses (something in the ephemeral range). You never need to figure that out - it's just made available when you run your server.
Pro Merge tool for VCS

Pro Open-source
Pro Input methods for most (human) languages
Including e.g. Chinese.
Pro Terminal and graphics mode
Supports the terminal mode with 'qemacs -nw' and a graphics mode.
Pro Good documentation and help
- Context sensitive shortcut help on F1.
- Good online documentation.
Pro Comfortable file browser
Easy to open and manage files (dired-mode).
Pro Supports many editing modes besides text
- Hex
- HTML / CSS
- Image
- Audio/video (maybe not the most sought after mode in a text editor, but, well, it's there)
Pro Full UTF-8 support
Including bi-directional writing.
Pro Super lightweight and fast
Pro Emacs like key-bindings
Use your muscle memory if you know Emacs already.
Cons
Con Slow runtime
Online IDE is much slower than desktop one.
