People know how KFC is different from McDonalds is different from Pizza Hut is different from Chipotle. Hell, most of the time they even know how Burger King is different from McDonalds (white meat chicken tenders and more meat in the burgers), how In'N'Out is different from McD's (simple menu, Thousand Island dressing, onion rings), and how Chick'Fil'A is different from KFC (sandwiches over buckets; Chick'Fil'A sauce; lighter frying). The extent to which these are viable as VC-backed chains is exactly the extent to which they can be differentiated in customer's minds.
Assuming they've eaten at Chick'Fil'A in the past decade, of course. Most people I know boycott it because of its horrendous anti-LGBT politics. (To wit: https://www.snopes.com/fact-check/uganda-murder-gay-chick-fi...)
Is there a joke in here I'm missing? I don't associate Onion rings with McDonald's at all, and In'N'Out doesn't even have them.