Which matters more for a scratch drive: sequential or 4k read/write speeds?

I'm thinking of getting an NVMe PCIe X2 drive for my scratch. In particular (this MyDigitalSSD 256GB)[https://www.amazon.com/gp/product/B077GZ7449/ref=ox_sc_act_title_1?tag=slicinc-20&ascsubtag=a84b54f06d2e11e8834ceef2e093f6790INT&smid=A3ISMVC1FTQD6C&psc=1#customerReviews] looks pretty tempting. It's got great sequential, but the 4k read/write (37/180) doesn't look that impressive compared to my 850 Evo (38/150). I'm guessing as a scratch, we're not really writing large chunks at a time so 4k would be more important? So there really is no advantage to go the route of this SBX vs my old SATA EVO? Some youtubers out there recommending NVMe for scratch saying it gives great performance boost are probably talking about something like the 960 pro is that right?