I think it's a matter of personal opinion and style at this point. I didn't own a MVP3 because I thought they were clunky, didn't trust built in batteries - looking at the VT makes me cringe. Colors of the 80's and again, a box. Can't see juice levels. Add another $20 and it becomes pricey (for wrapping the battery and the tank) and it's still a box. I can't hide that or that I don't have square hands. I also haven't figured out how tc will benefit me compared to being one more thing that could go wrong, have to figure out (I avoid Ohm's law situations) when all I want to do is press a button and suck.
There are people who love it and they can't understand the hype of the Subox, trash it, think it's stupid and go into long posts about how Kbox was a failure and people are stupid. They hate the design and like boxes better. They live in a different world than I do. It's a debate with no point. To each their own.
If it's got what you want and you like the style, go for it. Which is better? Neither at this point.