It will be not correct to compare these cryptocurrencies, although as I see, BNB is going to become one of the market leaders. probably, it is worth investing in it now as soon the price of Binance coin will go to the Moon.
but the situation is different from 2017. maybe people will think BNB will reach the highest prices like ETH in 2017. The BNB will still continue to grow, but it will wait for their blockchain development and wait for the market to improve better.
It caused by BNB has a product that has already taken from fund from the ICO that called launch pad. Remember when a lot of icos were gaining its momentum and millions dollars to be used to buy ethereum in the market. But this time it's a little bit different because less money used to buy ethereum to participate in the ico.
But about to say BNB as a killer and it's really wrong for me.