Has this been reported before? Chip is CG16233 in the Chip Guide. One that I found at the Convention has same colored edge, but the faces seem to be a different, lighter shade of plastic. Note that the grooves on the face expose the darker plastic. Same on both sides, so I don't think it is faded.
The inlays seem to be the same, even though the metallic gold hologram in the design seems to reflect differently on the two chips my scan. UV marks are identical.
See pic below for comparison.
Didn't pickup up an extra as I didn't notice difference till putting them together in my collection.