Xsx is suppose to its more powerful the fact tht so many are on par and Sony is winning faceoffs or going blow to blow says alot about PS5 engineering which includes many things including the use of more efficient apis.We don't know what Sony API limitations are or if it's harder to work on compared to DX12, some games did perform better on XSX compared to PS5
SSD helps a lot with open worlds, not sure why FF16 was dropping frames crazy when i arrive at Kanvir and Rosalith, probably Luminous engine shitting the bed again