I have the Evic VTC and like every one else, love it. However if I was choosing between a cool fire (I assume you are talking about the new one with the Atheon chip) or Evic, I would get the cool fire. The TC is supposed to be great, it has 2 amp charging and comfortable ergonomics. One big con for a lot of people is not being to update the firmware.
On the other hand the Evic mini is pretty frequent with the updates, shit you can even play flappy birds or whatever the fuck on it. It's also smaller and with a small tank or short RDA, invanishes. I think you can't loose between the two. Hope this helped, good luck.