2 NVMe SSD's which slot to put OS on and does it matter?

and NVMe SSDs Explained nvme m 2 ssd slot 2 slot is rectangular, with possible widths of 12, 16, 22, or 30 millimeters Most solid-state drives are 22 millimeters wide Lengths can nvme slot Comments240 ; The PROPER Steps to Cloning and Replacing your NVME SSD Hard

nvme gen 4 in gen 3 slot NVMe SSDs typically come in 5 dimensions, which may be deduced from the card name —2230, 2242, 2260, 2280 and 22110 — 22