Well, in my simple F-90 speakers system I can notice the bass is more distint in the left.
The speaker is not speacial, but they are adjust in a way to try simulate piano, maybe some small equalization difference for the left speaker.
If I could get a very good speaker, I would give preference to a prime stereo than for a not prime 3D.
I reamamber someone showing me a 3D system, a compact not expansive one for PC, and he was saying: "See, it's 3D" But the sound fidelity was a crap, and I never wanted that thing in my PC.
The system post above looks expansive, and probably have quality speakers, but the bass in a single point... similar results are not exactly fully results, in directional terms.