In the Chaos Magick paradigm, belief is a tool to get results. It is known for evoking popular culture characters as masks for cosmic forces. You want to evoke a warrior goddess? Try Buffy the Vampire Slayer. You want a god of Chaos? Warhammer 40000 has you covered. Belief shifting is a big part of CM. If you can invest enough belief in what you’re doing, you can evoke using sugar packets and a spoon.
They tend to eschew traditional methods, like the Golden Dawn ceremonial stuff, but, then again, some Chaos magicians do. A popular Chaos banishing I read about amounted to, “fuck off, you gits!”
They are the ones that popularized the Spare method of sigilization using your subconscious.
There is no difference, @TheRookie. It’s all in the mindset and belief system utilized.