1. The Ending: The anime concludes with a cliffhanger, leaving the story unresolved. The manga, on the other hand, continues to explore the characters' struggles and offers a more conclusive ending.
2. Character Development and Relationships: The anime focuses more on the action and horror aspects, leaving less room for character development and romantic subplots. The manga delves deeper into the relationships between the characters, particularly the romantic relationships, and explores the psychological impact of the zombie apocalypse on them.
3. Specific Events and Scenes: The anime skips over some events and scenes from the manga, sometimes altering the sequence of events. For example, the anime does not show the full extent of the character development that happens in the manga, such as the relationship between Saeko and Takashi.
4. The Tone and Atmosphere: The anime is generally more comedic and action-oriented, while the manga explores the horror and emotional impact of the situation more seriously.
5. The Fate of Certain Characters: While the anime follows the general storyline, it leaves some character fates ambiguous. The manga offers more definitive resolutions for certain characters, potentially giving them more closure.
In short, the anime is a good adaptation of the manga's initial arc, but it doesn't capture the full scope of the story, character development, and themes that the manga explores. If you want a complete experience and the full resolution of the story, it's highly recommended to read the manga.
Note: The manga is rated as mature, while the anime is rated as TV-MA for mature audiences.