What is a brand? For our purposes, a brand is a product line that has its own identity. There may be different products within that brand but they share an identity (e.g., Coca Cola, Diet Coke, Coca Cola Zero, and Coca Cola Cherry are Coca Cola brands and share the identity of being "Coca Colas".
Sprite and Fanta, also owned by Coca Cola, are separate brands. They each have their own identity and are not known as or called "Coca Colas".
We want to separate brands, not product lines.