The Oregairu mangas are known for their relatively close adherence to the original. They capture the essence and key plot points well. Though there could be some slight variations here and there, they don't deviate significantly from the source material.
It varies. Some parts are very close, while others have some noticeable differences.
I'm not sure exactly, but it seems to have a decent lead compared to some other series.
Not much. The Danmachi manga mostly sticks close to the source material.
Overall, the Invincible comic sticks closely to the original. There might be a few minor tweaks for better narrative flow or visual presentation, but nothing major.
It varies. Sometimes it follows closely, but there are some creative liberties taken to make it more appealing for the manga format.
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 doesn't deviate much. The manga mostly sticks to the key plot points and character developments of the source material.
It doesn't stray too far. The Re:Zero manga mostly adheres to the key plot points and character developments of the source material.
It varies. Some Lezhin Comics stick closely to the source, while others might take more liberties.