Both Dinosaur theme Super Sentai
Both have a "evil 6th ranger"
Both were in a crossover with Kyoryuger
Both feature a Red Tyrannosaurus Rex and Blue Triceratops

Both are Magic themed series
Both owned by Toei
Both fight mythical monsters and beings
A "red fire" wizard protagonist

Both were adapted into Mighty Morphin Power Rangers
Both were written by Noboru Sugimura
Both fight ancient supernatural forces
Female ranger is bird themed
A Ranger have a Father who went to the dark side

Both are Ninja series owned by Toei
Both fight demons/supernatural
Both have a American Ninja
Both appeared in Ninninger
Heroes inherited power from relative or descendant

Both are Ninja themed
Both have a female white ranger, a male red, blue and yellow ranger
Both fight against demons
Both are Super Sentai series
Both met in a crossover

Both are Ninja theme seasons with hints of both dark and comedy elements
Both have only a sole female member
Both are from the Super Sentai franchise owned by toei
Both had made a crossover to Ninninger