I think they are the same on the nnbs. On the k2 platform, if you have aluminum uppers, they have a different taper on the ball joints.
That's the best I understand it from doing my research when I was buying the stuff to lower it.
I just opted to match what it came with
Good on you. I've been the first to drive every new truck off that lot that my dad has bought since I was 9 years old. Yes, 9. I just drove it to just past the edge of the lot, but I was the first to drive it. I will never forget those times and she will likely never forget you trusting her...