Thanks Bob
Your literature (I was hoping you'd send a scan of some film, not a scan of a printed brochure) is quite clear on the subject: "The comparison of the two lenses shows a similar resolution and contrast in the area of the image circle". That's exactly what I found and suggested in my initial response to this posting.
The example is a 3.3X enlargement. It does go on to point out that at the edges of the image circle the "S" starts to perform quite a bit better. Most importantly, it's still not a direct comparison of two prints at 2.5X enlargement...
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