The 'How Not Summon a Demon Lord' manga is the original source, providing more background and nuances. The anime adaptation makes it more accessible with dynamic visuals, but might leave out some minor details for time constraints.
Overall, the manga offers a deeper exploration of the world and characters. The anime does a decent job of adapting the key moments, but for a fuller experience, the manga is better. It has more panels and text to flesh out the story.
Overall, volume 10 of the manga maintains the series' style and quality. It deepens the characters and plotlines. There are some unexpected turns that add excitement and keep readers engaged.
The first chapter of that manga is like a sneak peek. It gives you a taste of what's to come. Compared to the rest, it might be simpler, but it's crucial for hooking readers and setting the stage for the exciting developments that follow.