Denji Sentai Megaranger (1997)

It's the 20th sequel of the series from Super Sentai right after Gekisou Sentai Carranger which is the 19th sequel. If you would like to watch the super sentai series chronologically.

It's the 21th sequel of the series from Super Sentai right after Denji Sentai Megaranger which is the 20th sequel. If you would like to watch the super sentai series chronologically.

Both have a evil scientist main villain
Both have a female pink and yellow ranger
Both yellow rangers are photographers

It's the very first Super Sentai series what made many of it's successors possible. If you want to watch the original first season of the Super Sentai series.