I think that the comparison is off a little bit here..A USO should be compared to a SnB , not an NXS as far as glass goes. My next scope will be a USO..I am acquiring all three listed above, got the NXS and the SNB, and will see for myself which one fits my groove the best...but anything made in the USA gets major points in my book..And if you were to compare hear say ,,the USO kicks a#$ in customer satisfaction..All three maintain value so if it don't suit, sell it..