asking the difference between a bloog and a provari is like asking a starving etheopian child the difference between drinking skim milk and heavy cream. the bloog's best puff doesn't even come close to the provari's worst at any given time. you might be sitting there vaping away with your bloog battery fresh off the charger, you take a looong drag, and you'll say "Woah! That one was a nice puff! I wish it felt like that every time!" well... with the provari, you can get that puff, (or stronger if you'd like... you WILL like..) every single puff. You use the voltage regulator to tailor the puff to your liking. With the provari, not only are you getting that awesome variable voltage experience that so many cheaper devices can deliver these days, but you get the peace of mind of knowing that the manufacturer will fix your provari for free for 1 year... and if you drop, scratch, dent, or break your provari, you can get it fixed at any given time for a small fee. there is only a couple vaping devices on the market that give you that ability. once you try the provari, within the first hour you'll realize that your probably never going to use your bloog bats again. Its like climbing to the top of the tallest mountain, taking a deep breath, and realizing you've been living in a giant's ..... now u realize it stunk. Its a great device. but any vv device will get you by. the bloog bats are GREAT for out and about, or for when you can't look like a dweeb vaping a big ol mod, but for all other times, the provari is king.