Ethereum Classic (ETC) is the name given to the "shares" in the Ethereum Foundation created after the hard fork.

The biggest difference is immutability. The Ethereum blockchain was built on the concept of immutability. ETC was created, to distinguish it from ETH post-fork, because its developers refused to rewrite the code after the DAO hack. That makes it very interesting.

Catalysts for ETC growth:

1. Later this year, the ETC community will vote on whether to introduce a hard cap on its currency. Today, there are about 90 million ETC tokens. Under the plan, the number of ETC tokens ever created will be capped at 210 million. By comparison, an estimated billion-plus ETH tokens will be outstanding by 2070. The hard cap on ETC will create scarcity. And that scarcity will increase its value.

2. Barry Silbert, CEO of Digital Currency Group, has designed a type of fund that would allow institutions to invest in crypto coins like GLD did for gold. On September 25, 2013, he created the Grayscale Bitcoin Investment Trust and was able to invest $250 million of institutional money into BTC. He’s about to do the same thing with ETC, by issuing a security that owns a stake in ETC, giving the institutions that own the security an indirect ownership in the underlying token. The institutions that could not invest in ETH as it jumped 1000+% will be able to invest in ETC, practically on the ground floor.

3. ETC is about to launch support for a programming language called Scala, developed by one of Ethereum’s founders, Charles Hoskinson. He and his team expect to have a production-ready version of the software by the end of the year. This will attract other developers, attracting more users, creating value.

Good luck!