JupyterLab has all the features of Jupyter plus the following:
- Drag-and-drop reordering of cells within a Notebook and across Notebooks
- The ability to run native code text files; for example, sample.r
- Working interactively between a cell and a kernel to speed up development of notebooks
- Expanding view inline capabilities for other graphical formats
- A large number of extensions to Jupyter for custom graphical interfaces applicable to a Notebook