I haven't tried them, but I think you've summarized the difference accurately.
I might add that Contextual::Return mimics Perl 6 way of context flow. In Perl 6, a subroutine cannot know in which context it is called in (that information is not computable), so the way react to context is returning object that behave smartly according to the context they are used in.
According to TheDamian, Contextual::Return is "safe, robust, and handy, and which Damian regularly uses in his own deployed code".
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