
The growl/grind is the defining difference to me between the alder/RW/60's and ash/maple/70's specs, with many alder/RW/60's basses having a bit more character and grunt and growl in the low mids, and a more sweet airy treble response, and the ash/maple spec being bigger and more open down low, but that somewhat harsh, bright upper mid grind that tends to mask the upper treble a bit.
Both sound great. Hard to dial in grind in an alder/RW/60's model, and hard to dial in that warm growl with the ash/maple/70's spec.
That being said

, the relatively unusual ash/maple with 60's pickup positon Sadowsky Vintage spec gives me both grind and growl... IMO, best of all worlds for a one instrument solution (for a modern J tone anyway). I can easily dial out that upper mid brightness woth most upper mid controls on many amps, and that spec growls like crazy.
I love that spec!