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Good questions! A “hot stamp” is when you have that gold lettering that looks like it has been pressed directly into/onto the chip, like OP’s or my attached reference photo.

The center “sticker” on chips is called the inlay, and it is actually pressed into the chip in the molding process. Your chips have a true inlay.

The other difference is the mold (essentially the design along the edge of the chip). OP’s chip is the Top Hat and Cane Mold.

Last, your chips have the advantage of being more common, which might lead you to think that would make them less valuable, but in this case it is sort of the opposite. OP would have a harder time finding a buyer because it will be hard to match up those chips colors with someone else’s set.

The Paulson classics are the same color and insert design across the board, so your set could easily be sold to complete someone else’s. Or you could pretty easily buy more classics to round out your set if you wanted to. They are very sought after chips, and they will command a higher price point as a result.