I think they are all pretty much the same. Made in Korea
I had Nitro gears installed on my 2010 5 years ago, no issues.
My neighbor had Yukons installed on his Dodge truck 3 years ago and they've been noisy from day 1 and still are, my buddy has them in his TJ and they are quiet no issues.
What I've concluded from what I've heard from guys at various wheeling trips, Yukon quality is inconsistent.
This^^ they are all made by the same company in Korea. That being said each company treats them differently once they get them. I had yukons and they whined a lot. Now I have revolutions and they are really quiet.
Did you change them because of noise?