Well, manhwa is Korean comics and corn is a type of crop. There's really no obvious relationship between the two. Maybe in some very specific and rare context there could be, but generally speaking, they're completely different things.
Anime often has a more fluid and detailed frametate, with a focus on dynamic movements and expressions. Cartoons might have a simpler and more consistent frametate.
Overall, the Demon Slayer Tanjiro anime is a close adaptation of the manga. It retains the main storylines and the essence of the characters. However, there might be some minor differences in the pacing and visual presentation to make it suitable for the animation format.