I don't think that Ethereum is better that Bitcoin, most people go with Ethereum cos to me it's user friendly and also because most ICOs use it but Bitcoin will always remain the undefeated king
bitcoin is still the best and the price is proof that it is the best and most popular, ethereum only acts as a plaform while bitcoin becomes digital gold so actually both are on a different path and cannot be compared so in my opinion to prove which is better is by see the price