Overall, there are similarities, but the movie version of Mysterio also has some differences and updates to fit the cinematic universe. For example, his motivations and backstory might have been tweaked for the big screen.
The origin story of Mysterio in 'Far From Home' is all about a con. Quentin Beck was a tech - savvy guy who worked in the industry. He felt like he was passed over for bigger things. So, he devises this plan to make himself look like a hero from another dimension. He uses his skills to create these amazing illusions of elemental monsters and his own heroic battles against them. It's a story of a man's jealousy and desire for power leading him to create a false identity and deceive the world.
Well, Mysterio's origin in 'Far From Home' is centered around his deception. He made himself out to be this great hero from another world. But the truth is, he was just a man with a grudge. Quentin Beck was bitter about not getting the recognition he thought he deserved in the real world. He uses holographic technology and his knowledge of illusions to trick everyone, including Spider - Man, into believing he was a savior. His origin story is really about a man's thirst for power and glory through false means.
Mysterio's fake origin story in 'Far From Home' was a well - crafted deception. He presented himself as a hero from another dimension fighting elemental threats. In reality, he was using advanced technology to create the illusions of the elementals and his heroic deeds. His main goal was to gain power and glory, fooling everyone including Spider - Man at first.
He used his knowledge of technology. He had access to advanced holographic and drone technology. He created the story based on the idea of being a hero from another dimension. He probably thought it would be a believable story considering the strange things that often happen in the Marvel universe. Also, he knew that by creating a threat (the fake elementals) he could be the hero to save the day and gain all the glory.