Ahlan @firdaous!
I guess part of the answer to this lies in the discussion we had about Oud Mostafa No 5, and raw materials' innate potential.... Remember the Sri Lankan oil that smelled very nice but a little boring, and the cultivated Hindi that smelled like a finely crafted perfume? The same idea applies here....
In Thai Encens, you have very high grade organic raw materials (100% seah, to be precise) distilled straight up, in just any old pot, with just any condenser, soaked in the local groundwater of the distillery.....
In Jing Shen Lu, you've got carefully selected kyen, distilled in the same pot as Sultan Ahmet – right after distilling Sultan Ahmet – in exactly the same style as Sultan Ahmet..... Get my drift?
What you're getting is a blueprint of Sultan Ahmet, captured in the perfect medium, with even a tinge of the original masterpiece of the Sultan Series (Taha said it, not I!). That distillation was studied and planned extremely carefully, from the wood, to the soaking drum, to the water, to the pot – to the Sultan Ahmet residue that was carefully left inside the pot (as opposed to cleaning it with alcohol or boiling sandalwood to remove the scent).