You get a file conflict between the two on /etc/yum.repos.d/puppetlabs.repo as described at: https://ask.openstack.org/en/question/12041/rdo-releaserpm-fails-conflicts-with-puppetlabs/
This only affects the Havana packages; more recent releases do not include the puppetlabs.repo file. Is this worth fixing at this point, or should we just close this bz?
This does impact icehouse, though since Juno is no longer an issue