Really just how long they'll last. People on the mini state they go through anywhere from 2 to 4 batteries a day (1 to 3 changes.) Going by the mah, on a 18490 you'll get 1.5 times as much life. So expect an all day vape (probably not) to maybe 2 changes. You'll probably swap it out once. If you're a light to average vaper, on an 18650 there's a good chance of getting an all day vape. If you're a heavy vaper, I've seen some people say they have to swap once.
I haven't gotten my Provari yet, so this is just based on my research. And it's by no means all inclusive. I got the standard, because I figure I'll need to swap it once as a fairly heavy vaper. If I find that I'm swapping near the end of the day, and the extra length won't bother me, I can get the extension.
So basically, determine how much you vape, and if a bigger battery will be all that useful to you. Then decide which is more important, a small form factor, or a longer battery life. Personally, I'm pretty mobile for my job, and if I forgot a battery I could get stuck in a pretty crappy situation. I'll have a charger and a spare battery in my office, but that doesn't help if I'm offsite 40 miles away. I was tempted by the mini, but ended up with the standard with the 18490, with the option to go bigger. I also got a 5ml tank, so I should be pretty well off.
I haven't gotten my Provari yet, so this is just based on my research. And it's by no means all inclusive. I got the standard, because I figure I'll need to swap it once as a fairly heavy vaper. If I find that I'm swapping near the end of the day, and the extra length won't bother me, I can get the extension.
So basically, determine how much you vape, and if a bigger battery will be all that useful to you. Then decide which is more important, a small form factor, or a longer battery life. Personally, I'm pretty mobile for my job, and if I forgot a battery I could get stuck in a pretty crappy situation. I'll have a charger and a spare battery in my office, but that doesn't help if I'm offsite 40 miles away. I was tempted by the mini, but ended up with the standard with the 18490, with the option to go bigger. I also got a 5ml tank, so I should be pretty well off.