The Day One Edition comes with special recipes for items in-game, like the Slimy Block Recipe or the Gold Block Recipe and the Springtide Sprinkles Recipe.
If you plan on getting Dragon Quest Builders, you might want to go ahead and preorder the game for some special bonuses, like what comes with the Day One Edition of the game.
Likewise, if you choose Amazon or GameStop or EB Games to purchase the game, you’ll get a unique set of items as well.