Well, nnote posted that vaping at higher volts is some image/ego thing. For those who don't have a vv or a vivi yet, the volt range affects the heat of the vapor. So it's not all the same. I use a 2.4 head because I like the temp at 3.7-8 or so... other people like the hotter juice and draw of higher volts. So it's not all the same or all about the power/amps being equal. I hate hot higher volt juice or cooler lower volt juice. There's a big heat/taste difference even with a 2.8 head at 4.0 v, 4.2 v or 4.6 v. So I'm sure at 6v it's pretty hot vape for those that like it...
IMHO it is the same, if 2.4 ohms at 3.8 volts (6 watts) is what you like then a 6ohm head at 6 watts gives you six watts also... The same vape. People saying they like vaping at higher wats is meaningless, because then they say oh I'm using a higher ohm atty...
Yes, there's a bigger heat difference at 4.0 4.2 and 4.6 volts at 2.8 ohms, but you can get that same difference using a lower ohm at a lower volt range. This is just a 'bigger is better' mentality.
I'd rather aim for low ohms and lower volts, preserving my battery life and I still get the same cooler or hotter vape by changing ohms.