Currently when I’m quoting a post from a different topic, it looks nearly identical to quotes from within the same topic:
I think external quotes should be more similar to the embed you get from a single-line topic link, more like this:
I simply added an “in” after the post author and then include the topic title.
(slightly confusing example since the top-most quote is technically also an external one, but manually added. That was mere coincidence so please disregard it)