hmmm in my case i will not buy any other fans if i go with the NH-D15S Chromax BLack ,I'd go with NH-D15S chromax.black.
Diff explained by Noctua,
link: https://noctua.at/en/whats-the-difference-between-nh-d15-and-nh-d15s
Sure, NH-D15S chromax.black comes with 1x 140mm fan, but you can always buy more fans and slap on it, to increase static pressure. But you can not change the offset of the CPU cooler. And due to that offset, NH-D15S chromax.black is better.
i have another question what about Cooling efficiency will there be some difference in cooling or no ?