Just for the record:
Here’s at least some start at better communicating sdist/wheel differences: Add discussion of package formats, expanding "Wheel vs Egg" discussion by jeanas · Pull Request #1397 · pypa/packaging.python.org · GitHub
(Judging from this thread and Should sdists include docs and tests?, whether sdists should be treated as “source checkouts” and thus include docs and tests seems to be a largely controversial topic, so I didn’t attempt to formulate a recommendation about that.)