dna was the best in their day, right now they are lagging behind, one "oh ...." cancels a lot of atta boys. TC is over rated, they both have it, i won't use it as i don't vape that high and i have a lot of kanthal and nicrome is not very special (except for TC). The biggest thing for yihi is that you can update thru the usb, BIG PLUS for us that don't have tons of money, I just upgraded all of my equipment, have been using reos (they are great) but not good for traveling, We have some great equipment now compared to when I first started vaping, the sx mini is fantastic, next month or six months from now who knows what will be tops, right now it is not the DNA