Rick said:
I've only played basses made out of walnut. They were very pretty and sounded great. Couldn't really tell the difference between alder and walnut for a bass though. But I can't give any opinion vis-a-vi a guitar. I suppose given the higher frequency there would be a difference, but I can't say what it is. But for basses walnut is definitely prettier.
Ive gpot a Walnut body( the Strat, not me). You'll need to select your pickups wisely. I can suugest some for you if you want based on alot of res3earch and trial and error.
Most pickups will sound like icepick in a Walnut body.