Both are the platinum versions. I have some single cables left from the 1300 W one which I would rather use than the daisy chain ones on a system with the 1600 W powering dual 3090 Tis. I know each card needs three individual cables as opposed to the dual ones. There are simply not enough single ones (need 6) for the two GPU included with the 1600 W PSU. I know I can use the dual as a single but I am sure you have seen the octopus of a thingie with the adapter. Imagine two GPUs. If I could use the two singles I have left over from the 1300W PSU instead of two of the dual ones, the octopus will have less tentacles… I have to imagine the answer is yes but wanted to check with the experts.

the_Scarlet_one
P2 to P2 is the same cables.

Apologies, not familiar with what P2 stands for. Assuming VGA cables? So, yes?

P+ is the same OEM, so P+ cables will work with both PSU’s the same.

See: Which EVGA Modular Cables are compatible with my PSU? (Last Update: 2/14/2022) in the EVGA FAQs for more details.

But yeah, they're compatible as stated above by The_Scarlet_One