Do you people notice that the actors of Mebius & Kiva are from D-BOYS¿
Comparing an Ultraman Henshin to a Kamen rider henshin is like comparing an apple to an orange.
Let's see, Shunji Igarashi (Mebius), Hiroki Suzuki (GekiRed), Hirofumi Araki (Rio), Yuichi Nakamura (Zeronos), Masahiro Usui (Go-on Green), Koji Seto (Kiva), Kouhei Takeda (Kengo in Kiva), and Masashi Mikami (BoukenBlue) are all D-BOYS.
It shouldn't be a surprise as to where Toei is looking for male leads anymore.