I recall reading somewhere that the KC LED's are rebranded Trucklites and about $200.00 more.
I threw on a pair of Trucklites and think they are a great improvement over stockers. I'm pretty picky and the Y pattern folks talk about isn't an issue for me.
What I dislike more is my LED / Halogen long range combo. When both are on I get a mix of white and yellow lite. Time for pillar mounted LED's I guess!