What is the difference between KuCoin and Coinbase?

I'm curious to understand the main distinctions between KuCoin and Coinbase. Both platforms seem to offer cryptocurrency trading services, but what sets them apart from each other? Could you elaborate on the differences in their user interfaces, available cryptocurrencies, transaction fees, security measures, and customer support? Additionally, are there any notable features unique to either platform that might sway a user's decision towards one over the other?