Both feature villainous organizations where the higher ups constantly argue and one up eachother. In RX they do sever a leader while in jetman they are all trying to become the top dog
While RX is a lighter show it is still the direct sequel to black so if you want to see the next part of the story for our Kamen rider watch RX
Both have a darker overall plot but are very episodic with a lot of the episode plots being silly one offs. Lupat is sillier while black has a darker ending
Both have representatives from each previous Swanson come together and show the audience a bunch of clips
Both are series with a surface level space theme while changeman does more with having the go into space in the end while super-1 was training to be a astronaut before he became a cyborg
Super-1 is the sequel to skyrider both feature riders who are cool and level headed. Super-1 more unique thing with it's multi hands and focus on marshal arts but both end up as a basic Kamen rider series
Both are back to basics series with cool protagonists. Boonboomger has more interesting characters but that is because it is later but skyrider is still a good example of what these franchises are
These two have basically the same set up with a young man kidnapped by an evil organization that turn him into a cyborg to do evil with. Only to be freed by the one that upgrade then
Both have the main heros using electric powers and have their villian group fall due to infighting among themselves
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
They both have brutal fights that often show the monster bleeding and dismembered with a sometimes strange amount of gore
Both star main characters that grew up in the jungle. While gekiranger takes a more light hearted approach to that both do show the main characters having to adjust
