I'll help you. Don't buy either. Support companies that are upfront and honest about their output voltage, which Vaporesso is not.

If you don't understand what I'm talking about, check out the Wotofo Profile squonk thread., or the PX80 thread. In between all the nonsense and giant memes you might find some good info.

The basics, 4.2 or 4 volts output will result in a weak vape in many cases. It means there is no boost chip to increase the voltage past the battery limit.

SIMPLY: as the cell gets weaker, so does the mod. Most buyers of regulated mods do not like this, and I tend to agree.