Difference between ServiceUtil and LocalServiceUtil

1. *ServiceUtil checks permissions and *LocalServiceUtil does not.

2. You can only use the UserLocalServiceUtil from the same VM; the UserServiceUtil is
 for remote calls and thus adds the extra permission checking.

3. You use UserServiceUtil for remote calls (as a web service) and UserLocalServiceUtil
 for calls inside the same VM. If you want, you can disable the generation of
the remote methods in the service builder with the parameter local-service="true"
 remote-service="false"