They can not be compared because one is a matured project and the other just started its new life.
Also, BNB has limited functionalities if compared with ETH.
yes, based on function, of course the BNB still has very limited functions. but, in terms of prices, I think BNB can be a new challenger for ETH. even though it's still quite far away, but the potential in the future I think is quite good. it all depends on the future development of binance.
I agree that in the future BNB may be a new challenger to ethereum seen from its potential development in the future,
but for 2019 certainly ethereum which will have a greater growth rate, BNB is still too early to be able to match ethereum