I think BNB did far better than ethereum this year because it crossed its all time high up to 25usd although the glory was short lived for its investors. With that being said, 2020 will be a huge year for eth because of it innovations and upgrades on the chain. We have already seen two forks already. Hopefully by next year, the effects will reflect on the eth prices
You can see that this year BNB has been successful with some of their IEO. the launch of the binance DEX also made the BNB market stronger. more and more people are trading BNB. that's the reason this year BNB is better than ethereum. but all platforms have their development. and next year belongs to ethereum. we try to see what will happen in the market with updates that will happen.