If you're comparing ETH/ETC to BTC/BCH, then you should be saying that BTC is ETC and BCH is ETH. Ethereum "Classic" is the original blockchain. ETH is what forked off from it.
BTC is the original blockchain. BCH is what forked off from it.
Makes sense, and ETH is centralized as well. Also both ends with H, while the original ones ends with C.