If Sarah survived, it could change the entire dynamic of the game's plot. She might play a more active role in Joel's survival journey and their bond would shape the narrative in new ways. Also, the themes of loss and redemption might not be as prominent.
The Last of Us was not a comic originally. It was first developed as a video game, which gained significant popularity and later inspired other related media, but the comic came later.
The duration of the story in The Last of Us depends on several factors. If you rush through the main quests, it could be around 12 hours. But if you take your time, do side quests, and explore the environment thoroughly, it could stretch to 25 hours or more.