As an enlightened centrist, I like pineapple on pizza but don't really see the need for the brioche bun when it comes to burgers. Naturally, my opinion is the correct one.
The difference is in the presence or absence of sarcasm. Is this guy kidding? Doesn't seem to be, but if they are, they did an insufficient job signaling that.
I'll include a /S when in doubt, because text doesn't have a tone of voice.
Another difference is that one behaviour looks to genuinely exclude, while the other is inclusive and invites to participate in an inside joke.