I don't know where the cutoff for mini is but I like the Shield. It's small enough to carry owb and still disappear under a tshirt.
+1.
The Shield esp. in 40 S&W can be a primary or BUG. Though similar to the Kimber 45 ACP Ultra, my EDC, the lighter weight and (internal) striker vs. external hammer makes it much more of a very powerful mini. Less complicated manual of arms to boot.
I don't see the Kimber Ultra as a mini BUG, but still very concealable for a powerful primary CCW.
