ETC is the ETH with MODIFICATION.
The first modification was the hack. (DAO)
The second modification was to undo on a best way the first modification.
ETC is just the blockchain where a hacker (or a group of) got the most coins of the network and the first modification is not undo.
ETH is what ETHEREUM was intended to be.
Both coins have a manipulated chain, if you get that the hack was a manipulation at first
I hope all people are hitting the gong on ETC. Yeah. Until those who used the DAO will drop on the market, let the price crash and get rich themself.
Smart idea to invest on ETC
Whatever. Do what will get you profit, but always balance it.
Get some ETC, get some ETH and if you have to many from one exchange some to BTC, LTC or FIAT.
Cheers.