There used to be GoodRAM Iridum PRO and GoodRAM Iridium products - without PRO (I skip completely lower models from the C / CX / CL series).
Now there are models with red inserts, i.e. GoodRAM IRDM PRO and GoodRAM IRDM (without PRO).
IRDM PRO is probably an exact copy of Iridium PRO (the same controller, the same declared all parameters on the manufacturer's website, probably the same memories, since it turned out so evenly).
IRDM (without PRO) is ... it seems like a new disk, because it does not have much in common with the old IRDM - it is a completely different controller.
If you are interested, it once fell into my hands IRDM (without PRO) and I measured it in several tests by contrasting the results of my much longer Iridium PRO (i.e. IRDM PRO now).
https://www.elektroda.pl/rtvforum/topic3434173.html