Aren't those just the numbers for SATA connection vs. M.2 PCIe?
Apple doesn't manufacture SSDs, they buy them from the same companies that Dell, HP, Asus, etc... do. There isn't special Mac only models of those drives, it's all the same hardware in the end. The only advantage I see is that Apple was quick to switch to M.2 and macrumors cherry picked their competition to avoid PCs with M.2 SSDs.
Apple doesn't manufacture SSDs, they buy them from the same companies that Dell, HP, Asus, etc... do. There isn't special Mac only models of those drives, it's all the same hardware in the end. The only advantage I see is that Apple was quick to switch to M.2 and macrumors cherry picked their competition to avoid PCs with M.2 SSDs.