This review will be most helpful to people who have played the previous 3 Sengoku Basara games, not particularly Devil Kings. With that in mind, this game is not as good as those other three.
Story
This entry into the series continues the tradition of the series by having stories for each individual character, not one overarching story. This also cuts out nearly half of the playable characters introduced bringing the playable roster down to 16.
Sound
The only notable change to the soundtrack in terms of the style is a new theme song called "Naked Arms" by TM Revolution. This is also where the english and japanese versions differ the most, while the japanese voice cast, again, gives an incredible amount of effort and character into the various characters, the english voice cast is bad, which can be funny, and add to the overall entertainment, but doesn't compare to the japanese cast.
Gameplay
In terms of the gameplay, bases and an ally system have been added which do add a large level of strategy. Bases are represented on the map as red areas on the map when they are under enemy control, and subsequently turn blue when you destroy the enemy tower at the center of the base. Allies are bodyguards that can range from area playable characters to tigers, which is always fun.
Graphics
The graphics have been improved greatly from the ps2 games. The main characters' faces now animate during cut scenes which solves my biggest issue with the older games.
Conclusion
I absolutely love this series, especially the japanese versions. But, this game marks the lowest point in the series in terms of story and monotony. If you have played and loved the first 3 japanese Sengoku Basara titles and are not a collector of videogames, skip to Sengoku Basara 3 Utage.