Hi,
I have some doubts that the tcdb set "2013 Panini Prizm Perennial Draft Picks - Prospect Signatures Prizms" does even exist as such.
It could well be a duplicate to the "2013 Panini Prizm Perennial Draft Picks - Prospect Signatures" (i.e. without an extra "Prizms").
Also, other external sources could support that suspicion as they mention only parallels of red, blue, gold and black (see: https://www.psacard.com/cardfacts/baseball-cards/2013-panini-prizm-perennial-draft-picks-prospect-signatures/32599, or https://www.cardboardconnection.com/2013-panini-prizm-perennial-draft-picks-baseball-cards).
The whole issue has already "Prizm" in its name, so why should there be a parallel/insert called Prizm?
From the pics uploaded to tcdb for both sets I couldn't see any difference, either.
However, I would also be happy to learn what the difference in the 2 sets really is and be proved wrong and see if I applied the correct set to the card I have (for the time being I have decided to pick the set without the extra "Prizm" in its name).
Eventually, I wonder whether the 2 sets should be merged into 1 set through an inaccuracy report.
For the time being my initial approach to bring this up though an IR has been denied and I was prompted to post my thoughts/questions in the forums as more people who could possibly help could read and comment.
Thanks and regards, Peter