Building a new PC

And I want to get a small SSD, 64 to 128gb, for Windows to boot up. I found an M.2 ssd, but for 10$ cheaper I could get SATA SSD. Is it worth it for the m.2?

Btw m.2 is this: https://m.newegg.com/product/index?itemNumber=9SIA9TS3JP6992