How so? I can't say I've noticed any such occurance. The Lakland JO's, Glaub's and Dunn's sound pretty darn authentic to me. Heck, there's as much tonal variation within Fender Jazz basses as there are in the clones.
All I can say is that for me it feels like the sound is "bigger" with less "stuff" in the neck. I think there's a resonance difference between the two. I know that I can physically feel a difference between say a re-issue Fender, and a Standard one, in the way the neck vibrates. Put a hand on the end of the headstocks of the two and there's a difference.
... or maybe it's just me, I dunno.
) Anyway, I sent it back because the neck was too wide for me at the lower positions but otherwise it seemed well made. The fretwork felt good. I didn't get around to adjusting the truss rod as I didn't keep it for very long. A friend of mine is a pro guitarist in Vancouver and I got to play his Kinal. Very nice instrument!