I read an interesting article today by Bill Tancer title: "Brewing Battle: Starbucks vs. McDonald's".
My thinking is along the same lines as Tancer when he writes:
"I've always thought of these two chains as polar opposites — one designed as a sophisticated faux living room where customers could get a decent coffee drink and read their newspapers; the other, a riot of plastic-and-vinyl booths and bright fluorescent lighting where meals are counted in billions served. I wondered if it was really possible for these two worlds to collide."
Definitely an interesting read which you can find here.