I've sort of answered this based on my personal opinion here:
https://glassfish.dev.java.net/servlets/ReadMsg?list=advocacy&msgNo=132
There are plenty of comparisons around of feature matrix sets and there is advocacy from both camps. Ultimately only you will be able to tell what solution best meets your needs.
I suggest you download both and trial them and draw your own conclusions. If you run into any issues along the way or have any questions, post here and I know I'll do my best to answer anything I know or have an idea on.
HTH,
Andrew
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