Triad vs Black will be similar... Just less work to put in the Black to see reward and pop. Feel is a little better in the Black to me, but not to say the Triad and Black don't eventually both pop the same and as well with time. I think this may lead people to believe it's a much hotter bat, but only cause it feels a bit better and pops sooner outta wrapper.
The 12/30 model is a totally different beast. Shorter barrel with sweet spot a little further up by the cap feel wise, a little more Helmer or CL22 like in terms of other 12" bats. The handle flexes a little though after a few hundred hits. Get ready to adjust to a little bit of whip and bend in these models, but they smoke the ball if you can handle 12" barrels. Imagine a Juggy Utrip with Miken pop and performance and it sums up the 12 & 30's tbh.
My personal favourite of all Mikens was Freak 12. The Freak 30 hits as far and good, but I find the F30 had a firmer clickier feel than the 12 did. So I prefer the 12 personally.
Just to throw a wrinkle in this. My two all time favorite bats are the Miken OG Freak and the Worth PST. I've been going pretty good with the Triad 3 lately. Is the Miken Black any hotter or is it basically the same bat as the Triad 3? I saw somebody say the Freak 12 swung a lot like a PST which caught my eye. My gut right now is to grab a Black if it's better than the Triad 3. If they're pretty close performance-wise, maybe pick up a 12 or a 30 to mess around with.