I have an ALL redwood concert I made (even the neck). It's unbelievably light, which is fun, but the sound is incredibly chimey. Like 12-string guitar chimey. I have Worth Browns on it to tone it down a bit. Not a typical sounding uke, but wonderful none the less. I think there's room for all kinds.
Of course OP is actually talking about softwood back and sides with a hardwood top. And I haven't tried that combo yet, but I think someone ought to. Would be interesting to hear.