Cane or bamboo shafts are hollow. Cedar, etc. is not. I've heard (and I can't remember where) that the hollow shafts will move through paradox faster. IOWs, they oscillate faster and recover quicker from being bent. I think that translates into stiffer spined cane shafts working the same as softer spined solids. I think the cane reacts a lot like carbon fiber shafts, which are much stiffer than wood shafts, but fly nicely out of my trad bows. I have some GoldTip carbon traditionals 3355, and they're much stiffer than any wood arrow I shoot, but they fly wonderfully out of most of my bows above 40#.
I think the spine values are geared towards solid wood shafts.