To Spoof or Not to Spoof?

Mac Pro 2012 - should I be spoofing a Mac Pro 2019? Seems to default to this? Or should I be spoofing iMac Pro? I see people doing both. Not sure why I should spoof either or whether I should spoof at all.

I am finding the Finder windows opening on a new drive to be very slow and unusual on 15.1/2.4.0 and I am wondering if this might be because I am spoofing an iMac Pro.