More or less
SOA-P (the platform) can be thought of as the Enterprise ready version of JBoss ESB + a number of other JBoss products. It has gone through full/rigorous QA cycles etc.
JBoss ESB is a community project and is typically more bleading edge in terms of it having newer features that get tried out in the community (evolved etc) and before making it into the platform (more stable etc), or being removed completely. Think Fedora Vs RHEL (JBossESB Vs SOA-P).
So now springs up the next Q. Does that mean that when we have configured the eclipse Helios version with the JBoss tools for SOA Develoment we have actually in turn configured JBoss ESB as well???
If you attended my training class in Mumbai in January you can contact me directly using my email for questions on the training class.