Specific to my brand; 34″ and 33″ sound very even and predictable. 35″ yields a slightly more piano like character to the overtones of the low B and low E strings, yet leaves higher notes on higher strings (G & high C) choked and shorter on sustain. 32″ seems to be the breaking point where there is an automatic “ok….something sounds different here” effect on tone. There is more natural low end. The shorter you go, the rounder and more tubby the low end becomes. Pickup placement becomes an important part of how this tone is delivered (whether you want to bring out more of the naturally existing low end or manage it).
Another thing I’ll say about different scale length and tone; the way an instrument feels influences the way you play it. This can have as much of a tonal impact as carefully selected wood combinations.