If all three copies of each card are the Silver Signature parallel, this is just a printing defect or cards being stored in different ways. For those that don't know these cards, the entire background is foil. Everything but the car, name bar, UD logo and NIL logo is foil. I haven't noticed any difference in the many base and parallel cards I own for this subset. I did notice in the Images of '94 subset that there is a random slight difference in gold border foil looking more bronze than gold. Just a defect of the foiling process. If the foil layer is thicker or thinner than it was planned to be, the colors under the foil look darker or lighter respectively. I suspect this is the issue IF all 3 copies of each card if the same parallel. If they are not the same Silver Signature parallel, that is the real reason for the color differences.
NO PWE's EVER!!! PLZ PM me 1st before sending any offer. ONLY selling cards as of March 2024. No trades or purchases right now.
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Largest total PC card collections by Team, then Athlete (as of 3/22/24):
STL Cardinals (MLB) - 8810; Carolina Panthers - 2888; GB Packers - 1790+ cards
Mark Martin (NASCAR) - 2038 cards; Jimmie Johnson (NASCAR) - 1875 cards; Jeff Gordon (NASCAR) - 1594; Ricky Rudd (NASCAR) - 839; Ozzie Smith (MLB) - 707