[zelphirkalt]

I would guess, that it is running code directly using the interpreter of the respective language and does not require an "I<language>Kernel". As such it does not require you to install Jupyter or its many dependencies. I guess you only need the correct configuration of Emacs and the language's interpreter/compiler.

Another difference might be, that the result is just the result, not some structure in a JSON file, like it would be in a Jupyter notebook.