It varies. Some parts are very close, while others have some noticeable differences.
The Overlord manga closely follows the original. There are occasional tweaks, but they don't significantly impact the plot or the essence of the story. Fans generally appreciate how closely it adheres to the source.
Not much. The Berserk manga mostly sticks close to the original concepts and storylines.
It varies. Some Lezhin Comics stick closely to the source, while others might take more liberties.
Not much. The Dan Machi manga mostly sticks close to the source, with just a few tweaks here and there.
It varies quite a bit. Some key plot points and character developments are different in the light novel compared to the source.
The Overlord manga is known for its relatively close adaptation. It tries to capture the essence and major events of the source material. Some artistic licenses are taken for visual effects or to make it more suitable for the manga format, but they don't stray far from the original story.
Not much. The Konosuba manga mostly stays true to the original, with only minor differences.
The Overlord manga is known for its relatively close alignment with the source. Minor adjustments might be made to fit the comic format or for better visual storytelling, but it doesn't stray far from the original concept and events.
The Frieren manga is relatively faithful to the source. There are some minor differences in the presentation and pacing, but the core elements remain the same. It mainly aims to bring the story to life visually without major alterations.
It depends. Sometimes a story can stay very close, while in other cases it can stray quite far.