I think they're significantly lighter than the aluminum ones but I've never weighed them. My unscientific comparison was to trade my buddy stilts for a couple mixes. I was glad to go back to mine.
(He is now looking to get a pair now too)
On the kraft hawk when you remove the handle is the hawk mostly flat or does it have a threaded piece that extends into the handle which is hollowed out a bit? I'll try to get some pictures of what I mean tomorrow. My curry hawk sits flat in my bag when I remove the handle. I think the kraft one has that extra piece which doesn't stack so nice in my bag. Not a big deal if you don't remove the handle but I have to if I want to fit everything. I carry way too much stuff but can't seem to part with any of it.