Hey there, great question!
We took every step to make sure that the Standard series would be a lower cost, yet still great value option.
The Standard cables have a capacitance of 37pF/ft, and impedance of 4.0Ω/1000FT while the more Flagship models have a capacitance of 20pF/ft, and impedance of 10.8Ω/1000FT.
There's also a difference in connectors between the two of them. The Flagship cables have got USA made Neutrik connectors while the Standard line uses the highest quality import connectors available.