I still have not gotten around to putting glass or other optics on my 580-series Minis, and my aging eyes can't see irons well enough to shoot small groups at 100 yards, so I still don't know if my Minis will do better than 3" at 100, but, I don't really care. 3" at 100 would make a lot of AK lovers ecstatic, and wars have been won with AKs. 3" at 100 will more than suffice to hit a felon in the melon at 40 yards, which is OK for me, in my environment.
In the hours of darkness, when I am normally going to need a firearm, when things happen fast and close, I am usually quite content with a pump shotgun, and to be clear, I wear a badge. Arguing Mini-vs.-AR for civilian self-defense is much like debating how many angels can dance on the head of a pin, IMHO, and I include domestic law enforcement in the civilian category. At work, enough of my co-workers carry AR15s now, that I no longer carry one to work, and have elected myself to be the designated shotgunner. Someone has to be able to breach doors, and with the shotgun, a helmet, and heavy gloves needed to breach, along with the large boltcutters and small wrecking bar, I have quite enough stuff without having to figure out where to carry a rifle, too. (I voluntarily carry all this stuff, BTW; I am only required to bring the one duty pistol to work, and the issued go-bag contains nothing more dramatic than a gas mask and light plastic chem-bio suit.)
I am not trying to de-rail this in the directions of shotguns; just sayin' what I use for myself, real-world.
I have an AR15, and a couple of Minis. For private citizen self-defense, in most environments found in civilized areas, either will suffice when a rifle is needed, IMHO. I like the Mini's ergonomics better.
Seeing that the Sportical has no dust cover, means that I would rate the Mini higher, of just these two. An AR really needs a dust cover, IMHO.
FWIW, I just had a local dealer put a Tantal on a five-day hold for me. I may be about to visit the dark side.