PCIe vs NVMe: What's the difference?

In this video I discuss the difference between an SSD and a NVME PCI-Ex4 SSD From

Preferably _1 which shares lanes directly with the CPU rather than the chipset The only difference being narrowly lesser latency for professional storage

nvme 40 in 30 slot In addition, NVMe inputoutput operations per second exceeds 1 million and is up to 900% faster compared to AHCI drives NVMe also communicates directly

nvme vs m2 slot difference Non-Volatile Memory Express drives attach to the Peripheral Component Interconnect Express slot directly on a motherboard instead