Ethereum is the best among the two coins reason be that, Binance coin was push to the cryptocurrency market because of their exchange and they have continue using this coin to promote more coins in their cryptocurrency platform. During their IEO, this coin called  binance does not do well but later was made mandatory for anyone who want to invest on their platform or promote cryptocurrency project on their platform. Ethereum seem better than binance case use, this coin is scalable and helpful. This coin so far is the best profit taking project IMO.