I looked up on pelican and other online sources and they list two different part number for the spark plugs.
997.1 calls for bosch FR6-DPP-332-S
and 997.2 calls for bosch FR6-DPP-332 without the S, they even have different porsche oem numbers.
But it seems the first FR6-DPP-332-S doesn't exist as I tried to order them three times and keep getting the latter.

Can anyone confirm they are actually the same plug?

 

Go to the Bosch spark plug site:

https://www.boschautoparts.com/en/auto/spark-plugs

and select a specific vehicle and see what comes up.

 

hmmm comes up with an even totally different plug for the 997.1 now according to the bosch site, #8150 which I think is discontinued ...

 

Thanks Macster for that link, I called up bosch directly and it looks like the following plugs are all the same:
FR6-DPP-332
FR6-DPP-332-S
8150

I made a small error on the 997.2 plugs with the non-metzger engine those plugs are actually:
FR6-NPP-332 not D.
Difference is the 997.2TT has a 26.5mm reach while the 997.1TT and GT2/GT2RS plugs have a 19mm reach. I assume because of the 3.6 vs 3.8