The scan that Richard sent me is the one on the left with black background. My original-issue chip is on the right with white background. I'd say it's either an error, or Sahara has reordered chips. The inlays do seem to be of different sizes.

Very strange if it's an error as the narrow blue insert is in the place where a wide pink insert should be. Definitely of interest to an error collector if inspection in person doesn't show any evidence of tampering by someone and there was not a reorder.