well all ddr4 ram runs off XMP profiles. when you buy a ram kit that says DDR4-3600/4000 ect it just means it was able to run at those xmp profiles.
silcon lottery and such
most ddr4- 2133 kits will ( overclock ) run at higher xmp profiles than they guarantee.
my hyperx 2166 runs at 3200 with easy.
that being said i would save yourself some money and get a basic kit
btw the best bang for buck xmp for drr4 is 3200