Personally, I prefer KuCoin, since their UI looks really nice and I like the KCS bonus (I referred myself ) Also they add the new currencies faster. What are your thoughts on this?
For me, I prefer Binance over Kucoin because Binance has more altcoins than Kucoin. I do not care about their interface, I'm interested in quality and transaction fees. Binance did better than Kucoin at that point. So I would choose Binance.