Which model(s) were you able to compare (in person) between the USO and S&B? I'm not doubting your assessment, only asking for hands-on reviews of both glass (hopefully in the same magnification and objective size) to see if this is a fact across the whole offering from USO or just a particular model, either old or new.
I have used, and messed with the 3.2-17, the 5-25, the USO spotter (owned) and the S&B 5-25. Don't get me wrong, if someone was like, here's a USO I am not going to complain, but when you have the option of S&B, zeiss, as mentioned, the steiners and March (which is what I went with), and money isn't an issue, go for the best glass. I would use a USO if I knew I was absolutely going to use and abuse a kit.