US vs UK Clients. What are your insights?

For VAs that have handled US or UK clients, how do they differ in terms of work ethics, authority, approachability, etc? I've been working around US clients, but it would be my first time with a UK client so I want to know your insights on this. Also sa customers/patients, how do they differ from that of the US? Especially if they become irate. Are they more respectful or a lot harsher? TYIA.