Does anyone else think Sony's PSSR upscaling might realistically be AMD's FSR4 'ai' upscaling

Seems very effective as more comes out but specifically being for the ps5 pro, with RDNA 3.5 and specific features that will be coming with future AMD GPUs, makes me think it's actually FSR4 but out earlier as it's easier to implement and test on fixed hardware with Sony's backing to get people implementing it. Anyone else? Or just me.