Kishiryu Sentai Ryusoulger (2019)

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.

Both have main characters that make the world around them better. It feels like people's life's are improved by having met them. Both have iconography that invoke old civilization, while the ryusoulgers are part of the culture kuuga has to discover it's secrets by himself.

It is very clear that Ryusoulger was trying to bank from what made Kyuryuger profitable. From the Dino motif to the high energy dancing in the change to the exact same color scheme of the core team and sixth.
Other ways they were similar was that both teams were not trusting of each other at the start (The Kyoryugers didn't want to give away their identities at first and Ryusoul Black and Green didn't want to work with Red Blue and Pink), their sixth rangers didn't want to join with the team immediately and they both had villains that had a human inside them which later sided with the team to help.

It's the 42th sequel of the series from Super Sentai right after Kaitou Sentai Lupinranger VS Keisatsu Sentai Patranger which is the 41th sequel. If you would like to watch the super sentai series chronologically.

It's the 42th sequel of the series from Super Sentai right after Kaitou Sentai Lupinranger VS Keisatsu Sentai Patranger which is the 41th sequel. If you would like to watch the super sentai series chronologically.

It's the 43th sequel of the series from Super Sentai right after Kishiryu Sentai Ryusoulger which is the 42th sequel. If you would like to watch the super sentai series chronologically.

The two dramas from these two franchises also carry the same theme, namely Knights. And there are also differences, namely: Ryusoulger has a Dinosaur theme and Saber has a Book theme.

Both are seasons of Super Sentai about people from a secluded tribe taken in by a modern family, and both have heavy focus on swordplay.

Both feature the same actors after a 15 year gap playing heroes again. The fresh-faced Usagi, Mamoru and Motoki of Sailor Moon are also the veteran Master Pink, Blue and Red of Ryusoulger respectively.

Both are knight-themed series in the Super Sentai franchise (although King-Ohger is more into the side of royalty). They are also directed by Kazuya Kamihoriuchi.