Don, fair enough.

When you say the lenses aren't comparable,
but complementary, that is the beginning of
what I was trying to fathom in this thread --
how do the two lenses differ? And I was
grateful to have your thoughts on that. But
you are right, that subtleties of lens performance
being what they are, language often fails to
provide a satisfactory medium for the explanation.
And scans of negatives viewed on a computer
screen do very little to illuminate.

Sanders