It is difficult to say which of them will be the winner of this year. I would bet on Ethereum, this coin is very sympathetic to me. I think she has a bright future.
Both are deserving to be best to all, but when it comes in popularity, higher value and higher demand bitcoin is much better than Ethereum. But still Bitcoin and Ethereum are still have bright future and possible to continue more years running because of there having potential. And i think this two crypto will always be competing to each other without destroying to each other, because in the end both are rising and growing even more.