I've been using the staves from a tree I wouldn't have picked out as different from my other BL and they're just lighter in color than my other staves. I didn't notice at first, it's not like they take excessive set (especially the thick-ringed stuff), but when I was measuring a newer forty pound bow I noticed it was considerable thicker than an older forty pound bow of similar length, width, etc.
I've never actually confirmed it, but my thick-ringed stuff always seems to take less set and also seems to be more resistant to chrysaling, and even comes out slightly thinner per draw weight in my more narrow bows when I'm careful.
Does anyone have similar experiences, or is it just tree-to-tree differences that aren't actually related to/indicated by color, ring thickness, etc?