Is Kengan Omega the sequel to Kengan Ashura? Explained

We get to see anime shows like Kengan Ashura once in a while and maintaining the legacy is something more difficult. The Kengan Ashura anime has two seasons along with one crossover with the Baki universe - Baki Hanma vs Kengan Ashura. Keeping the manga in mind, the Kengan Ashura has been completed and it consists of a total of 236 chapters.
Now, the manga also has a sequel named Kengan Omega, which is currently running and has around 280 chapters. The manga is set two years ahead of the events that we get to see in the Kengan Ashura. It revolves around a new protagonist named Narushima Koga who steps into Kengan Association with the story taking a new dive with the introduction of Purgatory.

Kengan Omega could be dubbed a spiritual sequel of Kengan Ashura along with not losing the essence of the original one. Here the story introduces two new characters - Narushima Koga and Gaoh Ryuki. For an introduction, Ryuki is a killer who looks like a heavily unhinged version of Ohma Tokita. And then we have Narushima Koga who is an underdog and wants to become the strongest fighter of all.
Here the people get to see two new organizations - Purgatory and The Worm. Purgatory is an underground fighting organization that are rivals of Kengan. On the other hand, The Worm is a clan that is related to Chinese martial arts and Gaoh lineage. And Kengan Omega also explores the historical and political roots of different clans and organizations.
Now, for all the Ohma Tokita fans, yes, he makes a comeback in the sequel and is stronger than ever. The debut of Ohma Tokita was something that will give you chills all along. His entry into the party freezes everyone. Turns out that Ohma was saved by Dr Hanafusa Hajime after the Kengan Annihilation Final tournament. You should definitely read the Kengan Omega manga to understand the role of Ohma in the Kengan vs Purgatory tournament.