> Sure, reddit has a community aspect, but it's really just a side dish compared to the content (links).
Maybe if you stick to the default subreddits that are composed entirely of memes.
The main reason that I use Reddit is for the discussion; I highly, highly doubt that you're going to find /r/askscience-calibre conversations on Facebook.
OTOH, subreddits like IAMA, AskScience and ELI5 are fairly significant parts of reddit. In fact, most of the top items in /all are memes that refer back to things that happen within Reddit, so I'm not sure the links to external websites are nearly as important as the community these days.
Reddit revolves around people finding interesting content and providing it to others to be consumed with some commentary on the side.
I'm not sure how they're comparable. Sure, reddit has a community aspect, but it's really just a side dish compared to the content (links).