Currently, the only way to link to a revision (clicking "link"), you just get a page which shows what the post looked like at that revision:
Personally, I rarely use this and haven't ever found myself in a scenario (as far as I remember) where I would prefer the way it currently works to what I'm suggesting here.
- Add another link, or
- Change the current link
Such that it:
- Displays the diff on a separate page (I'd prefer this, since the highlight and scroll thing doesn't always work properly - although perhaps it has something to do with loading images, so it might not apply here, or, if it doesn't, we could fix that instead), or
- Highlights and scrolls to a diff, like what is done when you link to an answer (possible URL?)