I have not had the chance to even see a BRKT golok, but I have done a SXS comparison with the Junglas and both Condor knives PR mentioned.
The kumunga isn't bad, but it's totally outclassed buy the golok & Junglas. It's very light in hand and that translated into "less than stellar" chopper in my hands.
The Condor Golok felt great in hand, chopped good, sliced well, and was even used to "mow" a patch of very tall grass in a friends back yard to make a spot where he could start his mower.
The Junglas chops well, slashes pretty good, and splits wood for the grill with no problem (I know, batonning is evil... but it's fun)
both blades were very handy/efficient helping me thin (i.e. eradicate) a dogwood & locust thicket that came up in the wrong spot. I really like the grip on the Junglas and the sheath is fantastic for versatility.
good luck getting more reviews on the BRKT.