Here’s a small comparison between various well-known shaders using Vanillaccurate in a sample scene.
BSL v7.1.04.1 
Chocapic V8 Ultra Alpha 3 
Continuum 2.0.3 
Raspberry 2019-12-29 
SEUS PTGI E11 
SEUS Renewed E2 
Sildurs Vibrant Shaders v1.262 Extreme VL
please disregard the shiny aspect of Continuum and SEUS, those interpret roughness differently and I didn’t convert the pack for those specific shaders.
HardTop Vanillaccurate 