NVMe vs : What's the difference?

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I'm keeping the one that the laptop came with: Samsung SSD 256GB PM991, which my Windows 10 is installed on, but I'm buying one since I don't

2 M key SSD is its high-speed performance The M key SSD supports PCIe and NVMe protocols, which provide faster data transfer rates than SATA-based SSDs  2 M key SSD is its high-speed performance The M key SSD supports PCIe and NVMe protocols, which provide faster data transfer rates than SATA-based SSDs

monkey paw slot machine tool I'm keeping the one that the laptop came with: Samsung SSD 256GB PM991, which my Windows 10 is installed on, but I'm buying one since I don't I'm keeping the one that the laptop came with: Samsung SSD 256GB PM991, which my Windows 10 is installed on, but I'm buying one since I don't