Gotta agree, get 'em both! You won't be sorry.
The full-size Skirmish is a great knife, carries a lot better than you'd think, built like a freakin' tank, but the sight of that big 4+" hunk of S30V clanking into place, can cause sheeple stampedes.
The Mini-Skirmish is small
er, but far from small, with a blade of similar size to a full-size Griptilian, or Appartition, or Spyderco Persian (just to name three sitting next to it in my EDC drawer). It's definitely more discreet, though, and perfect for carry at work or anywhere else.
I gotta admit, if the Mini Skirmish had been out before the Skirmish, I wouldn't have gotten the big one. The Mini is just about perfect!