You will probably get a good split on this mostly because there is no correct answer. These two tires are different. The BGF KO2 has been around in some form for a very long time. It is a very good all around tire and has a unique look. I personally have never liked the look and prefer the mud tire look. The KO2 is definitely more of an A/T tire so will definitely not do as well in mud as the SST Pro.
The SST pro is a much newer mud tire. It will most likely hum a little louder but from what I've heard have excellent traction and depending widely on your subjective opinion on road noise are fairly quiet for a mud terrain. It will most likely be a tad smaller than the BFG based on the size given. You'd have to look up measured sizes to be sure though.
I'd vote Cooper but I'm running Duratracs which look fairly similar so take that into account.
2014 JKU Freedom Edition Hydro Blue
MC 3.5" Lift
37" Milestar Patagonia Tires
ATX Ravine 17x9 Rims
Barricade (SRC) Roof Rack
Barricade Front Bumper
Smittybilt XRC 12000 Lb Winch
D44 Yukon Zip Locker - 4.56
ARB Locked ProRock44 Front w/ 35 Spline Shafts
LOD Rock Rails
MC Overline Fender Flares
CAD adjustable F/R bump stops