Is there a difference: Brand name & generic?

Certain things MUST be name brand...

Hellman's Mayo
Gulden's Mustard
Heinz catsup
Scott tp
Lipton tea bags
Starkist tuna
Dixie paper plates (DH will only use these @@)

I buy America's Choice...

American cheese
Salsa
Rice
Powdered creamer
pre-made Rice pudding
The Good Egg (like Egg Beaters)

And probably a TON of other things I can't think of now!!