Bitcoin cash has the name of Bitcoin, it doesn't mean the coin can defeat Bitcoin in any race. Bitcoin is the king, replacing Bitcoin with any other coin is just a joke. Even ETH can never defeat Bitcoin in this race, Bitcoin has the Number one stability from long time!
Yes you are right, only bullshit that says that BCH can defeat BTC, so far Bitcoin is ranked first with the biggest capitalization of all Altcoin, so it's very difficult to beat Bitcoin.