Alienware Aurora R7 M.2 compatibility SSD

Hi, 

I am thinking about removing my Intel Optane and replacing with a M.2 SSD. I read a lot of threads here about the M.2, how to clone, excellent step-by-step but not info about compatibility of M.2 SSDs. 

I found 02 options to buy:

1- SAMSUNG 860 EVO Series M.2 2280 1TB SATA III V-NAND 3-bit MLC Internal Solid State Drive (SSD) MZ-N6E1T0BW

2- SAMSUNG 970 EVO PLUS M.2 2280 1TB PCIe Gen 3.0 x4, NVMe 1.3 V-NAND 3-bit MLC Internal Solid State Drive (SSD) MZ-V7S1T0B/AM

I noticed that the M.2 form is the same but there is a difference, the first one (860), cheaper is SATA and the second one (970) is NVMe. The Aurora R7 is compatible with both or just the 970?

Thanks in advance.