As an avowed fan of Sandalwood I empathise
I think you are caught in the perfumer's dilemma . . . profumo's Mysore + Alcohol blend is beautiful but does not perform like a perfume per se - the whole sillage / longevity thing.
Santal Noble and Villoresi (and Etro) Sandalo and others you mention 'perform' but are buttressed up with other ingradients and we'll never know how much, if any, Mysore is in there. I believe most use the Australian variety these days.
What to do then? I am just happy to use any of the above for my sandalwood fix depending on mood etc. and grateful I have a small amount of pure Mysore oil and a bit of the old C&E Mysore EDT to remind me of the good old days.