maven tomcat plugin or cargo plugin?

The spring source code examples use maven tomcat plugin and i am able to run these projects using the command mvn tomcat:run but what i dont see the application is not deployed in local tomcat server("C:\apache tomcat\webapps\")..

And how it is different from cargo plugin? (In this case when i ran the command mvn cargo:redeploy, i see the application deployed in the location "C:\apache tomcat\webapps\")

If i add cargo plugin to the POM of spring examples (like mvn-showcase,petclinic)..will it screw up the things?