In my own opinion, kucoin is a better exchanger more than binance because most of the traders of this market did not get any problems in the past and there are no scam allegations towards the investors.
I think Binance is better and it will become one of the largest Exchange in the cryptocurrency market. Binance has an easy-to-use interface, lots of support tools, low transaction fees, lots of listed coin and very good investor support. That's why I use Binance a lot to trade.