Django.test override_settings() vs modify_settings()

Going off of these docs.

What's the difference between override_settings() and modify_settings()? It seems redundant. The docs say:

It can prove unwieldy to redefine settings that contain a list of values. In practice, adding or removing values is often sufficient. The modify_settings() context manager makes it easy:

Couldn't override_settings() just be written to handle settings that contain a list of values?