No, you can't compare Blackberry and Apple to Provari and I'll tell ya' why - customer service and they stand behind their products for life (Provari). That's extremely rare.
Neither of those other companies do (in varying degrees) - esp. Blackberry who deserved to die in my book. They sold me a phone that would work with Mac and it didn't, yet the phone was dependent on computer interface for backup. I borrowed a friends PC and an 8 HOUR conversation because they didn't support XP either and that was 3 years ago. Iphone, similar non support of certain features like the ANTENNA. What good is a phone that won't connect? And Apple ID is a mess for someone who signed up for a .mac acount back in the computing dark ages only to discover that various evolutions now have it connected to iCloud, also required for backup with annoying pop ups and Apple ID is out of Apples' hands??? AAARRRGGGHHH. On and on it goes. I think I have 9 different apple ID's to keep track of, each for a different basic and essential function. I can't even watch freebie trailers on iTunes cause that ID's gone and lost into the ether.
When I bought my first Provari it was with the idea that it was the only mod I would need for LIFE (ha-ha, I know) and the rest is "filler". What is true is that it's reliable, dependable and if there's a problem, it's fixable for a reasonable cost. They keep their resale, which makes the price very cost-effective for even a new vaper. I wouldn't hesitate to buy a Provari V1 used with Provape behind it. It's a life time device.
None of the Provari discounters seem to give that much weight when the reality is it means a lot to me. I got burned with $200 of defective and dead "genuine" equipment early on in my vape life. Almost everything needs to be replaced every 6 months to a year or less. I hate that. I wanted off the buying merry-go-round with something that kept me off stinkies. Provari does that. As far as I'm concerned, the upgrades are icing on the cake. They could have stayed the same and still enjoyed popularity. I know their power and resistance measurements are accurate - better than some ohm meters. I can run through the menu blind folded. Few tricks or gimmicks to break down and unlike unregulated mods, it delievers a consistant vape quickly. Those things are really important and it's nice to have at least one device that I can count on to deliver that.
I don't know why watts was limited to 20 when even Joyetech has an atty coming out with a "sweet spot" at 27 watts. I've never vaped at that wattage and I'm not experiecing a calling to do so - at least not yet. Psbuardo was disappointed although he didn't say so directly, it's easy to hear in his comments.
But you could run a mac truck over a provari and dump it into a swimming pool and I think Provape would struggle to save it. That's piece of mind I can't find with anyother mod. I have used mine for over a year and if I sold it in the classies, I'd get all but apx $50 back. That's pretty cheap IMO.
A person can go to FT and buy a mod for sub-ohming for < $20. I don't see why anyone would want to compete with that nor is it necessary.
The vast majority are interested in not smoking again and Provari does that. Sub ohming is not all there is to vaping.