ram is ram... got the 3000 just because... case was initially supposed to be white, hence got these in white to match, but still look good with all the other parts, and low profile helps with space in mini itx build..
RAM is RAM, but this is quick RAM. Not sure what DDR4-2133 would be like compared. But mostly i got because of the White sticks. Fit nicely. 16GB is almost minimum for optimal gaming I've heard. Choose 2 x 8GB, room for 2 more when needed. If needed. No lag yet.
UPDATE: I bought another pair of these to make 4 x 8GB but still makes them 2 dual channel sticks. My computer reads over 32GB installed but I haven't learned enough about XMP profiles within the BIOS or manually setting clocks, so I mine as well of bought the 2133, until I switch things my DRAM Frequency is 1066.7MHz = DDR 2133 :/ to the books and knocking a star down, only due to motherboard defaults really but for $200 can get risky being ignorant.