No, they're not exactly the same. There are often some differences in the portrayal and abilities of Mysterio between the comics and other adaptations.
Yes, Mysterio is often depicted as an illusionist in the comics. He uses his skills to create elaborate and deceptive illusions to outwit his opponents.
Definitely. Mysterio is a villain in the comics. He often uses his special effects and mind tricks to outwit heroes and cause trouble. His motives are usually self-serving and malicious.