Honestly, I take it all with a grain of salt, and tend to look a bit askance at anything that claims to be "Just like the real thing".
I think we fool ourselves a lot.
Get it "Reasonably in the ballpark" and I'm happy, most especially for default planes.
If there's nothing glaringly wrong, or if you need to take a microscope to the numbers to show what's wrong, then it's very likely too small to make a difference, to me.