The VooPoo TPP Tank is the newer version than their PNP tanks; but very similar. The TPP is taller, and therefore holds more eliquid. It also uses TPP coils instead of PNP. That means if you want to vape salt nic, you would want to stick with the PNP tank as it specifically has coils for that. I do like the look of these more than the PNP if you’re ok with the slightly taller size. All in all, you can’t go wrong with either option, it just depends on how much juice you want to hold or if you’re specifically using salt nicotine.