The quality of discussion is the exact same. Lemmy isn’t more elite, hell I’d say an average user is more angry in general than on reddit. As for the rest - a regular (non-power) user doesn’t care. The privacy angle is bogus - you can get everything you want by hosting your own instance. Even more so - things that should be private, aren’t (reports, upvotes). The only “good” thing is the modlog, but that is also debatable.