You cannot compare ETC with Bcash. ETC has never done a hardfork, ETH did the rolback hardfork and ETC supporters simply stayed on the original chain. ETC supporters are right if they say ETC is the real ETH because it technically is.
Bcash is a hardfork off the original BTC chain without consensus (tiny minority), so people who claim BCH is the real bitcoin are technically wrong. Beside that ETC has never attempted to attack ETH and Bcash attacked BTC already several times using market manipulation, paid shills and one time even a flaw that was forked in (EDA, forked in because otherwise the fork would die on arrival because there was no consensus at all = clearly satoshi's vision LOL). Bcash only exist to attack BTC, there is no other added value in it. (LTC and Dash are way better for unchain transactions).
yeah, that's why I deliberately used the word "legacy" and not "original." ETC is not the original Ether either, as it has forked into the "every 5,000,000 blocks decreases reward by 20%" update (I can't remember the ECIP number), so in truth neither Bcash or ETC are "original" coins, they are merely running legacy code because a small group of developers want things to remain mostly the same instead of evolving into something more. They are nothing more than backups in a worst case scenario.