From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Devin Reade
The above answer is right-on. From a technical perspective, you can probably expect the 3rd party software to work exactly the same on RHEL and CentOS (barring some implausible edge cases), however your 3rd party vendor may refuse to support you at all if you're using something that's not on their supported platforms list.
Hehehe, for what it's worth, I encountered one of those edge cases a few years ago. Dell OMSA, at least in the days of Centos 4, was distributed as a self-extracting binary, that would read the contents of /etc/redhat-release and compare it against a list of predefined strings, and then refused to operate. The workaround was to hack /etc/redhat-release.
But anyway. That's pretty unusual. Thanks...