What's the difference between EnableEurekaClient and EnableDiscoveryClient?

There are multiple implementations of "Discovery Service" (eureka, consul, zookeeper). @EnableDiscoveryClient lives in spring-cloud-commons and picks the implementation on the classpath. @EnableEurekaClient lives in spring-cloud-netflix and only works for eureka. If eureka is on your classpath, they are effectively the same.

Discovery service concept in spring cloud is implemented in different ways like Eureka, consul, zookeeper etc. If you are using Eureka by Netflix then @EnableEurekaClient is specifically for that. But if you are using any other service discovery including Eureka you can use @EnableDiscoveryClient.

In terms of its practicality and simplicity, if the registered center is eureka, then @EnableEurekaClient is recommended. If it is another registration center, @EnableDiscoveryClient is recommended.