Both have a five core team with the same color pallet
Both are fighting inter galactic beings wishing to destroy earth
Both have the same composer
Both star Yuji Kishi
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.
It's the 22th sequel of the series from Super Sentai right after Seijuu Sentai Gingaman which is the 21th sequel. If you would like to watch the super sentai series chronologically.
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.