I have both. Been vaping for less than a month and started out with the T3. Started off good (vape, TH, taste) and it started leaking, BAD. Tried a few things to fix it but no dice. Purchased a Vivi Nova Mini along with a new coil for the T3. I was talking to the guy at Salt Lake Vapors about the issues I was having with the T3 and he mentioned to me due to the design of the T3, I would need to take longer, slower draws off of it to prevent gurgling and leaking. Any-who, I liked it as well but started to get a burnt taste and a few dry hits. Loaded up the T3, cut a slit above each wick and started vaping. Vape was bigger, TH was stronger and taste was better. I tend to chain vape once it gets later in the day and even after a few hours NO LEAKS! Sorry for the long story but long and be hold my choice is going to be the T3