When elGeo saw yesterday’s “Why does this look familiar?” thread, and also saw the current Pardon My Planet, he wanted to create a “Department of Self-Plagiarism” to hold all these. Because the PmP was a clear repeat with minor variation of a 2015 PmP he remembered well, and had liked at the time.
The one elGeo remembered, and sent in:

And yesterday’s:

Assuming we’re all familiar, at least in its outlines, with the O. Henry short story “The Gift of the Magi”, this post is still a CIDU — for questions like “Why change it from a watchband to a belt?”, not to mention “Does a re-purposing come off better than a simple rerun?”.
But wait, there’s more! You say the change of format from squared-off to landscape necessitated a belt longer than the watchband had been, to fill the frame? Well, no: the belt is not shown stretched out horizontally, it just has a downward segment. Further, the comic did not undergo a change of format; it apparently coexists in both on a regular basis. For the GoComics archive delivers this landscape version of the older instance:
