For now Bitcoin and ETH are the most popular coins, so I think they will continue to be comparisons between one another and will be the choice of crypto users. When compared, each of them still has advantages and disadvantages, back again to the interests and functions that we will use.
Yes both cryptocurrency were popular amongst any other cryptocurrency existed. Both crypto have proved how worth it to invest, the team behind these coins were doing well to prove how really good it is to invest in this two crypto. But for me, i couldn't compare ETH to Bitcoin. Why? First and foremost the value of ETH in the market was incomparable to the market value of Bitcoin. Second, among the two crypto i am surely that investors would better choose bitcoin rath than ethereum.