The visual novel is more immersive. Because you are the one making choices in the visual novel, it gives you a sense of control and makes you more engaged in the story.
The anime of Chaos Head is a condensed version of the visual novel. The visual novel usually has more in - depth storylines and character developments as it can afford to be more detailed. In the anime, some plotlines might be simplified or cut for the sake of fitting into a limited number of episodes.
The anime often simplifies the complex plot of the visual novel. In the visual novel, you can get more in - depth character development through the text - based interactions. For example, in the visual novel, you might have more detailed internal monologues of the characters which are sometimes cut short in the anime.
It's hard to say which is more popular in general. The anime might have reached a wider audience as it is more accessible in terms of just sitting down and watching. However, the visual novels are very popular among hardcore fans who enjoy the in - depth storytelling and interactivity. So, popularity can vary depending on the group of people you consider.
It depends on your local laws regarding video game content. If the game contains any controversial or restricted content in your area, then it might be illegal to buy. So, it's always a good idea to check with local authorities or do some research on your own. In general, as long as it's sold through proper channels with proper ratings and approvals, it should be okay.
The duration of the Chaos Head visual novel is not fixed. It can take anywhere between 15 and 25 hours for a thorough playthrough, factoring in different playstyles and the extent of interaction with the story elements.