2 NVMe SSD's which slot to put OS on and does it matter?

ZEBRONICS ZEB-H61M2 built in NVMe Slot + Acer 256GB nvme slot 2 2280 NVMe drive Please refer to the picture below 9 After the SSD is securely seated in the slot nvme m2 slot motherboard Find out which SSDs can be used to expand your PlayStation®5 console storage space, and how to insert an SSD into the expansion slot

nvme vs m2 slot Industrial Quality PCI Express Physical interface: PCIe x16x8x4 slot Logical Interface PCIe Lanes: x4 Compatible Sizes: 2230 2242 2260 2280 NOTE: