Ethereum Classic is very much the same cryptocurrency as Ethereum, it has a big difference, most of the original developers no longer work on it. The most important and potentially innovative feature of blockchains is that they work without being controlled by any force connected to the project, more importantly, outside of it.
It is oriented towards the development of decentralized applications and has excellent potential, but it generated a lot of controversy.
Its objective is to maintain a robust development ecosystem capable of handling commercial applications.