The disc is very nice, thank you.
Some of the patterns look more accurate, and will be more reliable.
However, the biggest difference from the USB is the speed of Loading.
For grayscale sweeps, the next frame is almost instantaneous, well worth the cost.
Theater: Sony A1E OLED 4K Ultra HD, Oppo-205, Anthem AVM60, 7.1.4 B & W CM 7 LR,CDM-cse, CM 1, CM 1 S2, Silverline minuet , SVS SB13 Ultra, Rotel RMB 1555, Parasound A23, Naim NAP 100, EEcolor lut box. Calman, MobileForge, I1D3 & I1pro 2.
Stereo: Aurender N100H, Auralic Vega DAC, Focal Chorus 836 W, BAT VK-3ix, Pass XA 30.5, PPP.