Well, technically all these coins are scams since every single one has centralized mining or stake, but whoever the scam leader is, is determined by who can fool the most people into claiming it's decentralized while also offering the lowest fees.  Since Bcash and Bitcoin are both entirely ASIC centralized under the same people, neither wins that department, but it's possible Bcash could win simply by having lower fees.  That is, unless it's possible to create a decentralized Lightning network, but it's not possible, it just centralizes bitcoin even further than it already is.  So everything depends on how many people you can trick with propaganda between each centralized system.