LS50 aren‘t per se better than the Concepts. They have a different sound profile. But soundquality wise they are very even matched.

It hurts to say because they are gods for me but: The Beatles till “Help“.

They mixed weird stereo sound and used absolutely aweful microphones. Even for those days standards their records sound terrible on good equipment.

Totally bass shy, yes. And not very dynamic. Zeppelin is the best example.