Element classifications and visual estimating

What is the advantage of utilizing e-Specs software http://e-specs.com/ or BSD Speclink
http://www.bsdsoftlink.com for designers and contractors? Make your observations in reference to the Building
Systems Classifications in the AEC Industry (From Uniformat Assemblies to CSI MasterSpec to Omniclass).
Does this relate to Visual Estimating? Check out Assemble Systems https://assemblesystems.com/ . Explain
your answers.