There is a massive difference between ETH and BTC in terms of first mover advantage. BTC has made people money and continues to be a store of value (for better or worse) - that is basically it's main use case. ETH has a ton of dApps and projects that simply can't succeed or scale if Ethereum doesn't figure out how to scale before the competition does. Projects will jump ship if there is a better alternative, and EOS already has projects that are banging at the door for their mainnet launch. I am heavily invested in both project (EOS/ETH), but my money is on EOS at this stage - ETH has too much baggage that will mean the evolution of the platform will not be quick enough to keep up with the revolution and quantum leaps that EOS and other 3rd gen platforms are going to take.