Super Saiyan Blue = Super Saiyan God Super Saiyan
Super Saiyan Blue 2 = Super Saiyan God Super Saiyan 2
Super Saiyan 2 = 2 x Super Saiyan
then:
Super Saiyan Blue 2 = 2 x Super Saiyan Blue
Kaioken doubles the user's speed, power and all other abilities
then Super Saiyan Blue Kaioken = Super Saiyan Blue 2
and Super Saiyan Blue Kaioken x8 = Super Saiyan Blue 3
and Actually Goku can use Super Saiyan Blue X10 and X20.
The only point of those two transformations are saving stamina.
and actually Super Saiyan Blue Evolution Vegeta matched/surpassed SSGSSKKx20 Goku