I'm not keen on the Mini myself... Simple because I know that a single 18350 would never cut it at work... And if I'm gonna use an 18490, well those work in the standard too... And with a single extension cap I can go to 18650.
I mean, I love the small form factor of the Mini, it just wouldn't be practical for me... Except maybe around the house, where I can swap the battery out real quick. I have a feeling though that I would almost always have an extension cap on it... And seeing as how I don't like the look of an extension cap anyway, I prefer the standard ProVari
Heck, there is no wrong choice! I'll probably get a mini some day... just because...