Not necessarily for the same products - people cooking at home aren't deep-frying everything.

"What I cook for myself at home" and "what I order in restaurants" are two pretty disjoint sets.

I'm not even sure the total number of calories will come out 1:1; are people eating less because they're not commuting or working? Eating better because they are cooking? Eating worse because they are depressed? I can't even guess.