Two special editions of “Red Dead Redemption 2 just went up for pre-order, a "Special Edition" and an "Ultimate Edition" Regardless of which one you choose, all pre-orders get the War Horse, which is basically just a horse with additional stamina and an Outlaw Survival Kit.You'll also "up to two million dollars in additional in-game money" when you pre-order on the PlayStation Store or Xbox Store, which you can spend “Grand Theft Auto Online.”
As far as the actual differences between versions, the “Red Dead Redemption 2: Special Edition” gets some extra story content, including a mission where you can knock over a bank. You'll also score some extra equipment, in-game outfits, and horses.
The “Red Dead Redemption 2: Ultimate Edition” gets you all the goodness of the special edition, plus a racehorse and a saddle, along with access to the online Survivor Camp Theme, plus more weapons and rank bonuses so that Ultimate players can move up quicker, up to level 25.
Red Dead Redemption 2 hits PS4 and Xbox One on October 26, 2018.