The Monster Race Edition = Base Game + Hunting Season Pass + Fifth Playable Monster + Two More Hunters and Four extra Monster Skins.
The Digital Deluxe Edition = Base Game + Hunters Season Pass. Saves you almost $4 versus buying separately.
Alternative Deals: DL Gamer is $18.99 after coupon DLG-WAPOBUAF
Alternative Deal: the Microsoft Store offers a bonus $10 Gift Card.