This version of Xevious for the NES in Japan utilizes the Disk Writer peripheral, providing a potentially larger game capacity compared to standard cartridge-based releases. This allows for possibly enhanced visuals, more detailed soundtracks, or additional levels compared to the standard cartridge version.  Gameplay remains centered on the classic shoot 'em up style; however, the Disk Writer version could offer a more refined or expanded experience.   It is a Namco title, with the specific details of the Disk Writer version's development and release requiring more detailed research.

Xevious (Japan) (Disk Writer)

Xevious - The Avenger (USA)