Kamen Rider Stronger (1975)

Both have main riders based on the Japanese Rhinoceros Beetle. Both the protagonists are cheeky, Stronger in a more playful way while Kabuto is a very self confident rider. They are different as well as kabuto is the about super speed and stronger about electricity.

Skyrider is the series after Stronger so if you want to watch the Kamen Rider seasons in order then watch Skyrider after Stronger.

Stronger is the series after Amazon so if you want to watch the Kamen Rider seasons in order watch Stronger after Amazon

Both are very mobile riders. While Hibiki has a home base he is frequently shown camping and training looking to fight monsters. Stronger does not have a place to stay and is always traveling looking for an enemy plot

Both have the main heros using electric powers and have their villian group fall due to infighting among themselves