I think I'm the other side of the fence on this one. I do own both but I find myself gravitating to the P3 on a regular basis. This is not so much an issue of the P3 is better than the Radius, it is just that I'm finding the P3 more comfortable to hold.
I think that box mods are bulky and cumbersome in general and I use them as more of a "desk friendly" device - if I'm working in the office or sitting at my desk I use the Radius, it's extremely comfortable to hold when compared to most other box mods and like any Provape, the firing button is silky smooth.
But when I'm on the move, the P3 in 18350 mode can't be beat for portability and "stealth." I also enjoy having it with me when I'm lounging in the home theater seats as well - tube mods and cup holders go together like popcorn and butter! I personally don't find any difference in vaping between the two mods, you know you're using some of the best quality devices money can buy.
That's what it all boils down to for me. Which type of mod do you find more comfortable? Tube or box? Sure, it's easy to charge the Radius via USB, but it's just as easy to swap batteries for one sitting in your charger. Upgradable? Well, in all reality the Provaris will work just fine even if you decide not to update as most upgrades I've seen so far have been minor fixes so waiting until you're in the vicinity of an upgrade place is not the end of the world.
Of course, you can be like so many of us here on these forums - get your favorite now, and six months down the road add to your collection!
