Maven tomcat plugin: tomcat7:run or tomcat7:run-war?

I am using tomcat7-maven-plugin in my Java web application. Now I can run my web server using command mvn clean tomcat7:run. Recently I notice that there is another command called tomcat7:run-war from http://ift.tt/2rrHOFQ, which says:

tomcat7:run:
Runs the current project as a dynamic web application using an embedded Tomcat server.

tomcat7:run-war:
Runs the current project as a packaged web application using an embedded Tomcat server.

I know the command tomcat7:run-war will package my application to a jar or war file and then run it inside an embedded server. My question is that under what circumstances should we use this command, isn't tomcat7:run enough? Or maybe running a packaged application will have higher performance? I am not sure. Thanks in advance.