Update comparison.
My older bottles of RY4 and what used to be called Ruyan4 .
Samples received April 10th of RY4 and whats now called Ruyan notice no 4 designation after Ruyan .
vaping them in genuine MM Vapor DID'S @ 1.7 ohms mesh wicks.
First would like to say my older ordinal RY4 and Ruyan4 are not the same .
This holds true for the newer samples sent to me RY4 and Ruyan are different from each other.
Now comparing them to the old bottles.
Old and New RY4 are the same .
The Old Ruyan4 and the New Ruyan without the 4 designation im certain are the same as well although i detect a faint fruitier taste with the new probably because its taking longer to meld but its the same just needs little more time.
Remember mine old ones are months old compared to the new ones that were mixed 12 days ago but they have not changed from the old profile in my humble opinion .
As a note they were mixed exactly the same nic/pg/vg and flavor ratio as the old and vaped at same ohms and same 8.5 wattage.
Hope this helps others.
and
Thanks Linnx for the samples sent.