Audeze Lcd X vs Beyerdynamic DT 1990 Pro

The Beyerdynamic DT 1990 Pro uses 250 ohm impedance with 96 dB sensitivity and ships with two earpad sets for tuning, while the Sennheiser HD 660S2 uses 300 ohm impedance with 104 dB sensitivity. Both cost roughly the same and need amplification, yet the DT 1990 Pro sounds brighter and more analytical than the warmer HD 660S2.