^
NX: Standard stamped steel cogs, and other than the three-cog cluster at the top, each are individual pieces with plastic spacers between them, offering 11-50 range.
GX: Upgrades to a one-piece construction with all cogs pinned together, and increases to 10-50 range.
X01: Upgrades to a one-piece hollow machined steel main cluster with alloy 50-tooth cog pressed onto the back. Premium black ano coating to reduce friction and increase durability.
XX1: Same construction as X01 cassette, upgrades to PVD gold Ti-Nitride-like coating to improve corrosion resistance and durability.

https://bikerumor.com/2018/06/23/com...nx-gx-x01-xx1/

Eli anodisoitu pinnoitus olisi kestävyyden kannalta mahdollisuus. Ajattelin vaan, jos jollain sattuisi olemaan omaa ”testidataa” jaettavaksi tai muiden testaajien dataa tiedossa.

Ja kelpaa vertailu Garbarukin vastaavaankin, jos löytyy.