What's the difference between maven-rpm-plugin and rpm-maven-plugin

I see references to both on line but can't find out why. Is there a difference? If so, how?

What is RPM Maven plugin?

The RPM Maven Plugin allows artifacts from one or more projects to be packaged in an RPM for distribution. In addition to project artifacts, the RPM can contain other resources to be installed with the artifacts and scripts to be run while the package is being installed and removed.

What is RPM mapping?

A more advanced technique called "Remote Predictive Mapping" (RPM) was developed by the GSC for mapping Canada's North (Schetselaar et al. 2007) , to predict spatial rather than temporal geoscience properties.

maven-rpm-plugin is an older version of the plugin (which I suspect works with maven-1). rpm-maven-plugin is the one which works with the current versions of maven. You should be using this.