For me It's a smoother vape. I can tell the difference between my Sigelei's and my provari/Dna mod easily in the quality of the vape. At least to me it seems that way. Reliability and quality are in there somewhere as well. I've probably dropped my Provari 10 times off my lap onto the concrete getting out of my truck. Still working like a champ. Dropped my vamo once, the head popped off, now it sits here decapitated.