What's the difference between sending a deck versus a proposal to a potential sponsor?

A deck is meant to start a relationship and open the door for conversation, while a proposal is for proposing an official business relationship with a brand you already know. Tony recommends sending a deck first rather than a proposal to companies you don't have a relationship with yet. He specifically states he receives more proposals than decks, but it should be the other way around. Sending a proposal without knowing the company's plan won't get high consideration, whereas a deck opens the door to learn what their objectives are and start meaningful dialogue.