As of the writing of this, there's 225 questions tagged remote-control and 537 tagged remote-access.
The description on the "tag info" page for the latter seems much more complete than the info for the former tag.
Specifically what puzzles me is the snippet I bolded out:
Gaining control to a computer or equipment while not necessarily being physically located near it. More specific tags include [remote-desktop] and [vnc]. Not the same as [remote-access].
So, I wonder: where they differ? And where do they overlap, if any?