I took some time over the weekend and though about it - and came to the conclusion that you cannot answerer that question because the question is not correct in itself. SOA has to do with switching position and behold your world from another angle, was my conclusion.
And lo and behold; today i found an article that explained a lot of stuff surronding this for me: http://wisdomofganesh.blogspot.com/2008/02/deciding-characteristic-of-soa.html
Great explanation of the differences between SOA and SOAP-RPC.
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