When the poll is over...
Ok, the poll has expired (in hindsight, I should have done just a 1 week poll, as nobody voted after the first week) and the results are now visible. They aren't what I expected. I had thought that "neither" would far outweigh either preference.
I don't think that's due to a significant difference between the photos though - rather I think it's due to the psychology of perception. Almost everybody who expressed an opinion preferred one because it was "brighter", "darker", or "crisper" than the other. In fact, the two photos are nearly identical in both brightness and contrast. They do have a gradient background (meaning the background is darker at the bottom and lighter at the top). When viewed one above the other, the mind interprets that the top photo is darker and the bottom is brighter. Because it seems brighter, the bottom photo also appears to have greater contrast - which we interpret loosely as "crisper" or "sharper".
That is why I made the additional post with the two images in reverse order - so people could see that although B looks brighter in the first, A looks brighter than B in the second. If I view them side-by-side, whichever one is on the left looks a little warmer to me (I see colors a bit differently in each eye). I flipped a coin to determine which picture to post first, but am confident that had I swapped them, the poll results would still show preference for the one on the bottom.
When viewed side-by-side at regular display size, I can't tell a difference. When enlarged, I see aliasing differences from the resampling (but neither is "better" than the other), and a very small difference in "purple fringing" (a form of chromatic aberration).
So, why did I post two nearly identical photographs? Joe hit the nail on the head (spoilsport :biggrin

. One was taken with a Canon EF-S 60mm f/2.8 Macro lens I just purchased, the other with a Canon EF 28-135mm f3.5-4.6 IS lens, which is about 2 generations old and came bundled as a "kit" lens with a camera I bought 6 years ago. Both images were shot with the same camera settings (camera position, framing, shutter speed, aperture, white balance, shooting style, focus point, etc.). Both were post-processed the same (crop, levels, fill-light, brightness, contrast, resampling, sharpening, etc.) except that one lens produced significantly warmer images than the other, so I color-corrected them both to neutral. Either picture could be made better with additional post-processing.
My point is that you don't have to spend a lot of money on a fancy lens to take good pen photographs. Although the EF-S 60mm macro lens is a little better (optically), the EF 28-135mm IS lens is plenty good enough. It is also less expensive and far more versatile.
I hope the exercise was interesting,
Eric