First of all...I HATE mud. So I'm going to avoid it any chance I get and I'm not looking for a tire to be good in the mud. I'm looking for a tire that will do good on some wet rocks, on what mud I can't manage to avoid, and not drive me crazy with imbalance or noise on the highway to the trail. I've had KM2s before and they met those needs, and the general feedback I've read is that the KM3 is an improvement.
I realize I'm shopping for a "mud" tire but it will see pavement since all the wheeling spots will be 2+ hours away and my kids like to ride in the Jeep to go out for ice cream (though probably not in torrential rain, usually). I can handle what a tire throws at me as long as it's predictable, so maybe the wet weather traction shouldn't be a factor, but I'm gonna need a convincing reason to pay the price of 6 tires to only get 5. The same applies to the Falken, which for whatever reason is also 20% more expensive than everyone else. What justifies that? and why do they need an extra 10 pounds per tire to do the same job as BFG or Goodyear? Hell, Interco isn't known for lightweight tires but the TrXus you suggested is closer to the weight of a BFG or MTR than it is to a Falken.
I agree that there are a lot of similarities in the tires I posted. In fact, something that is really common but really turns me off is that almost everybody puts this weird rib right at the shoulder that seems like would ruin the efficacy of having any traction features on the sidewall to begin with, and to my eye basically makes it look like it's only pretending to be aggressive. BFG, Falken Interco, and and one Maxxis model (the Trepador) are the only ones that have a single lug that actually wraps around from the tread surface onto the sidewall. It may be silly, but with 100% honesty it's the reason I haven't already pulled the trigger on some STT Pros.
