@ AaronDx,,,
In trying to answer your question, I'll go about it as follows.
Watts are not Watts are not Watts in regards to your question,, example, taking say 9 Watts to say a 1.5ohm coil and then taking that same 9 Watts to say a 3.5ohm coil will not result in the same vape. Changing the resistance , the resistor (Atty,coil) makes a huge difference I'n the equation. However most like to vape at a certain set wattage this is when Watts are Watts are Watts but what's on the other end that's accepting those Watts can change the outcome. By that,, specificallY the flavor outcome, personally I find my sweet spot ohm's wise between 1.3ohms and 2.4ohms depending on what type of set up I'm vaping, and what juice,, but with a higher ohm coil say a 2.8-4.0 coil I find the flavor is not as intense , also with HV vaping I find a different experiance then LR in the actual vapor, the HV is a bit heavier of a vapor with a bit more of a muted taste. Different juices vape differently as well and the nice thing about having a regulated wattage device is being able to fine tune that device to match up the resistance your using and juice your using and dialing it into your perfect sweet spot or likings, everyone is a bit different in what there perfect Watts/ohms set up is, then you also have to throw in what type of wick you like best as well, Silica, cotton, bamboo, SS mesh , or XYZ, so many different variable that go into it all, so bottom line is having a variable wattage device is nice to have

these are my own personal findings and opinions Only.