^ Well...I can finally end this debate

I called my dealer that has both a 2019 Santiago Silver and the 2020 Savile Silver.
He went out and looked at both...and luckily they were almost next to each other.
The 2020 is 100% a darker shade of silver

Not as dark as the HG...but definitely darker. Still metallic.
So...if anyone truly loves the Santiago Silver...better get a 2019 while they are out there !!!!
I think this makes sense actually. The white, SS and SI were all very close...and far from HG. Having white, SI and this new gray being a shade darker spreads out the spectrum a bit.
Bob's yer uncle.