Ka’Bandha is the better model imo, but it has the advantage of being a resin kit of an organic creature. It was always going to come out looking much better than plastic Angry Ron, despite the myth that "plastic is just as good for detail as resin" (it isn't, compare the Krieg kits).
Angron still looks good, but seeing Ka’Bandha definitely took the wind out of the sails around Angry Ron for me. The wings between the two especially standout in contrast to one another.
Of course for £235 of resin, you'd hope he'd be the better kit of the two.