They have the 350V batteries that are "new" 14 module 100 packs. I've a suspicion and a good pile of evidence that they're actually refurbished 16 module 100 packs into these other packs with 2 modules removed (since, as I keep trying to make sure everyone understands, you can not replace bad modules and neither can Tesla, so what do they do with a broken 100 pack?)... but haven't been able to confirm this with 100% certainty.
Putting a 350V battery in a performance variant, especially a dual motor performance, seems like a terrible idea with an out-of-warranty powertrain, since now you're stressing the drive units ~15% more than you were before, especially under high load.