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I use both. All I can say is the XOOPS is very hackable. This is good for me.
IMHO:
typo has been developed in a very strange manner. While many peeps on thier mailing list are all so defensive and will brag about it, I think there are so many things that are broken. There's lots of, as I would call, hair brained ideas.
Xoops is not perfect, but you can fix it up to work very well for you.