What is the difference between VPS and cloud server

Both vps and cloud servers are virtualized servers with all the functions of physical servers, so what is the difference between the two?
VPS: vps are multiple independent virtual servers created from one physical server
Cloud server: multiple independent virtual servers created from a physical server cluster The
biggest difference between the two is that a single physical server The resources are limited, including cpu, memory, bandwidth, hard disk, etc., and multiple server clusters are more guaranteed in terms of stability and security.