If the new LCX sounds worse than the original, its probably because of the rail splitter, otherwise the circuitry and parts are identical. I have never seen a rail splitter test well.
The original squarewaves all burned up due to heat and other stupidity, but otherwise sounded really nice, still the only headphone amp I know of that is both current feedback and all of the voltage gain in the output stage. The re-done version is still a sweet but low powered amp.
dynalo and supersymmetry dynalo still out perform everything else in their power class and as far as I know, no one has ever been able to burn one up.