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Comp-notation-2 results are wrong. The two notations have the same URI and local name so the result should be true.
I don't read this interpretation from F&O 13.1.1: Summary: Returns true if $arg1 and $arg2 compare equal on a codepoint-by-codepoint basis. Else returns false. So I think the result whould be false.
Fair comment: it appears to be a bug in the spec then. I'll raise it there.