It varies. For some series, the manga might give away key plot points that could lessen the impact of the anime. But for others, the manga and anime offer different perspectives and can both be enjoyed independently without spoiling the experience.
Not necessarily. It depends on how you approach it. If you can separate the two experiences in your mind, the manga won't spoil the anime. But for some people, knowing the story beforehand does make the anime less exciting.
Not necessarily. It depends on your perspective. Some people think it does, while others enjoy having prior knowledge.
Sometimes it can. If you know the story from the manga, some of the surprises in the anime might be lost.
Not necessarily. It depends on how you approach it. If you can separate the two mediums and enjoy each for their unique aspects, it won't ruin it.
It varies from person to person. For some, reading the manga might make the anime less exciting, but for others, it enhances their understanding and appreciation of the adaptation.
Not necessarily. It depends on various factors like art style, story adaptation, and personal preferences.
Not necessarily. Sometimes there can be differences. For example, the anime might cut or add some scenes.
Not always. Sometimes there are differences, like changes in the story order or added elements for better animation.
Not always. Sometimes there are differences in the way the story is presented or certain details are changed.
It's not a rule that manga must be turned into anime. A lot depends on factors like popularity, potential audience, and production feasibility. Some manga are just fine as they are without being animated.