SunRace MX3 10Spd 11‑42T Cassette vs XT+OneUp 42t, Comparison, Issues

SunRace MX3 10Spd 11‑42T Cassette compared with XT M771 OneUp 42t extender sprocket, construction, weight, issues. Largest cog is 7075 aluminum, just like OneUp. 11-42T • 10-speed Wide Ratio • 6 Sprockets on 2 Alloy Spider Carriers • A7075 Largest Sprocket • Alloy Lockring & Sp acers • [AY] 11-13-15-18-21-24-28-32-36-42 • Finish : M[Champagne] / O[Black Chrome] • Weight : 387g(11-42)