There's no one - size - fits - all answer. The 'little busters dub' has its own charm. It can make the story more engaging for those who have difficulty reading subtitles or just prefer to listen in a different language. The voice actors in the dub can add their own unique interpretations. On the other hand, the'sub visual novel' offers an authentic experience. The original voices and the ability to read the exact translated text can be appealing. For example, if you're a fan of Japanese voice acting or are studying the language, the sub visual novel would be great. Ultimately, it comes down to what you value more in your viewing/reading experience.
The dub is the version where the voices are in a different language (usually English), while the sub visual novel has subtitles in the original language. In the dub, voice actors try to convey the emotions and story through their own interpretations in a different language, which might bring a different feel compared to the sub. The sub visual novel allows you to experience the original voices and read the subtitles to understand the story.
It contributes by expanding the world - view. The 'Made in Abyss' series has a vast and complex world, and 'Old Stories' can show different aspects of it. It can introduce new characters or events that are related to the main story, thus enriching the overall narrative. It might also give a better understanding of the history of the Abyss, which is crucial for a full appreciation of the main series.
The answer is yes. Made in Abyss began as a novel. This original form allowed the creator to lay out the core ideas and storylines that were later brought to life in other visual and narrative formats.
The Made in Abyss manga is on hiatus for now. Maybe the author needs time to flesh out the story or there could be other behind-the-scenes factors affecting the schedule.