That depends. Unless a manufacturer is lying or the device is faulty 15W is 15W so you shouldn't have any difference in experience between two different devices all set at 15W.
On the Joytech website they have a table of the wattage and ranges. My only concern would be that the coil you use is...
For pen style I like the Ego One CT and VT batteries. Unlike the regular Ego One batteries these detect the resistance of the coil and set the wattage accordingly. I think that for 0.8 to 1.6 ohms the CT sets it to 15W. The VT one has additional low, medium and high modes.
Well of course taste is subjective and the atty one uses also makes a difference but I found the marshmallow-ness to be subtle, if I had to do a blind taste test I would say I taste brown sugar and almonds, if someone asked if I could taste marshmallows and went "looking" for it then I would go...
Don't mean to be a party pooper or anything but this ruling doesn't actually mean much other than in the court's eyes the current definition of smoking does not include vaping. In other words the ruling is about semantics not about whether vaping is perceived as better or worse.
@SunRam said his work quite well in the iJust 2, I was just wondering how they would compare head to head :)
Also, don't know if you've seen but there are also gClaptons compatible with the Target tank.
If I had it in the iJust 2 I'd always wonder if it would be even better in the target...
From what I gathered the vaporesso ccell coils are compatible with the Ijust 2 tank so was wondering if they perform just was well in the Ijust 2 or whether the Target tank is a must.
You can check the Joytech website for the exact differences but in essence they both have three modes. Constant Power, Constant Temp for Nickel and Constant Temp for Titanium, you can check the forums here for more info on Temp Control.
Ignoring temp control for now the VT has three power...
Perhaps consider the CT or VT versions of the Ego One mentioned above. Even if you never use temp control they do have the benefit of automatically adjusting the watts based on the coils you use.
The Ego One isn't a bad device at all in my (admittedly limited) opinion. Don't know about the twisp tank though, they seem to have redesigned it a bit but it uses the same coils. Before buying a new ijust 2 I can recommend trying the CLR coils for the Ego One. Either the 0.5 ohm (more airflow)...