No one have some idea bout this ??!!
When you ask me personally, no, I've no comparison between the two.
I asume you've already searched the forum and read e.g. this thread http://www.jboss.com/index.html?module=bb&op=viewtopic&t=73955
If this does not provide enough info, please ask a more detailed question, but preferably a question like: "can I do x with jBPM"