They come off of the same line , yukons are lapped for quieter operation and pass better on quality control. But USA standards work fine for sled pulling
^^^^THIS X2!!
The USA Standard gears have been holding up as good as anything else we've tried. Definitely the best bang for your buck. Let me know what your looking for I just got in (2) pallets of Dana 80 and AAM 11.5 gear sets.
Jason