Board Thread:Naruto Discussions/@comment-33485854-20180907234534/@comment-734582-20180908093434

Littlegen wrote: I maybe overthinking it, but how does Naruto differentiate using Version 1, Kurama Chakra Mode, and Kurama Mode? I don't think he does. Now that Kurama is free to cooperate with Naruto, their power is essentially shared. Naruto can freely tap into his chakra at any point. Chakra mode simply uses the chakra for physical augmentation, and kurama mode allows projecting the chakra avatar.

V1 is simply chakra mode + kurama's will, while V2 is kurama's "essence" leaking through (IE naruto is transforming into the actual biju).