The main difference about this Fuji is that... well there's a richer Kamen Rider Flavor (you were the only one back then). There's no Japanese sun goddess in the form of a wolf (at least not yet)... And instead of Reisen being the "Other" Touhou character to join after Kaguya, It's now Mokou (Which means It's less Master Servant type and more I'M GONNA FUCKING KILL YOU type of interactions)... Oh... and no deadpool.

Situation is subject to change.