An overwhelming amount of people feel a difference in their high with different vapesNo, it doesn't end the discussion, for a few reasons:
1. This is one test. Without repetition, it proves very little.
2. Each vape can cause different amounts of total canabinoids to be released in the same period of time, due to many factors, including varying temperature regulation machinery, air flow rate, and material density.
3. This study appears to have used the settings on the vapes which correspond to 210C, according to the manufacturers, but as anyone with a vape knows, you have to test the temperature yourself, to know what it actually is. Furthermore, those temperatures might be the temperatures of the heating element, or the temperatures of the air when it makes contact with the material. If the heating elements of two vaporizers are the same temperature, but one is further from the material.
4. Those bars aren't the various the different percentages of chemicals in single samples for each device. Each color represents a different test, for each vaporizer. They are measures of the "percentage of total cannabinoids found in the vapor".
5. This study shows more how much a device can extract in a given time, rather than total. It may take an Arizer Solo less time to extract a 50 mg load, but if you run both a Solo and a Volcano until the entire sample is vaporized, the results should look much more similar.
If you personally don't feel any difference, then that's you
The fact that these vapes hit with varying potency demonstrates that in part and what I said is based on what you said in your post
That study contradicts your own assumption about the vapor being the same at the same temperature
If you don't agree oh well because I am not interested in going on forever about this
Enough people experiencing varying effects with different vapes over years leads me to believe that it's an actual thing