I have both and I love both... for waaay different reasons. Zenesis is an advanced user device with a learning curve, like has been mentioned, but it is the most satisfying vape yet for me. That said, there are many times when I'll grab the Provari first. Another thing to consider is availability. You can have your Provari (production APV) in a week or less. A Zenesis (hand-made APV) is a different story, unless you want to pay scalpers prices on the classifieds. Although production is ramping up on Zens. You are probably still looking at 6-8 weeks optimistically.