If you were limited to a Dell Precision 7920, require disk performance over capacity, require dual (but not quad) monitors, will never use Pro 3D, how would you spec it out? I'm agonizing over the difference between PCIe NVMe Class 50 Solid State Drive versus Dell Ultra-Speed Drive Duo PCIe SSD x8 Card, 1 M.2 1TB PCIe NVMe Class 50 Solid State Drive. On to CPU's, my current 6 year old workstation with it's dual Xeon E5606 2.13 GHZ blows my laptop wi...Dual NVIDIA® Quadro® P4000, 8GB, 4 DP (7X20T) but likely will only get approved for Dual Radeon™ Pro WX 5100, 8GB, 4 DP (7X20T) as it's 1/3 the cost. And is 3TB (24x128GB) 2666MHz DDR4 LRDIMM ECC too much? Not enough for Pro (Kidding!).
Both of those SSDs you listed are "PCIe NVMe Class 50" so they're going to be about the same (top of the line for Dell). Not sure what we're supposed to be comparing here.
For CPU, you should still consider clock speed as an important factor. The multithreaded nature of ArcGIS Pro makes multiple cores relevant, but it's only part of the story.
If you're not doing 3D stuff, you're probably wasting your money on dual graphics cards. You can always add a second one later!
Finally, 3TB seems absurd for memory. I didn't even know you could get a computer with that much memory! An your storage drive is "only" 1TB...
Storage is not an issue for me. I have a local 40TB SAN with a quad NIC and iSCSI. We have a policy of not storing project work on local computers. Once the work is done, it has to be moved to the SAN by the end of the day. Not sure what the difference is in the drives either, but the second costs twice as much as the first. From what little I can understand from Dell website, the SSD "Card" is significantly faster then the first choice, was wondering if any GIS'ers had experience with that particular Dell drive.
It does say "Duo" so maybe it's RAID?