Differences between NVMe, AHCI, SATA, PCIe, and M2

Do you require a SATA or NVMe SSD interface? An SSD module is connected to an industrial motherboard either through a SATA interface or via a PCI Express

The quick answer to the NVMe versus question is that there is no versus at all NVMe is the interface, and is the latest form factor for

nvme slot vs m2 ON your board, the slots support both SATA & NVME but not at all speeds this means top slot likely supports PCIe 4 and bottom supports PCIe

nvme pcie slot 2 PCIe NVMe SSD will not be compatible with your SATA port Basically, different protocols and interfaces are used in both these connections