When creating a new notebook using the web interface, Jupyter gives me two options: 'Python Interactive' and 'Python 3' (see screenshot).
However, I've been unable to find any indication on what the differences between these two kernels (which I assume they represent) are. Both are python 3.6.7 on my system. The search term jupyter combined with "python interactive" or "python 3", even with quotes, yields only generic descriptions of Jupyter, which is not really surprising. Even the Jupyter kernels list doesn't really help.
So, what is the difference?