How interpret different Pytorch nightly links?

I’m trying to install Pytorch nightly with CUDA 11.6.
The documentation says to use the following URL: https://download.pytorch.org/whl/nightly/cu116 as an argument to pip.

When I go to this URL, I see 2 different links: torch and torch_nightly. What is the difference / why are they both under the whl/nightly path?

I would recommend to use the created install command from pytorch.org and allow pip to grab the right binary for your setup.