Hi RAZD,
My 15ft kayak is 35 lbs, an aluminum canoe, with less material (no deck) and the same length weighs more, and the kayak is stronger (doesn't flex as much).
Not really a fair comparison, the kayaks design has a lot to do with the reason it flexes less (no deck on a canoe).
I would bet the surface area for your kayak is less than that of the canoe, therefore which one would be less material?
Wouldn't it be better to compare a wood canoe to an aluminum one? Comparing a kayak to a canoe is like comparing an open river barge to a submarine.
"No sympathy for the devil; keep that in mind. Buy the ticket, take the ride...and if it occasionally gets a little heavier than what you had in mind, well...maybe chalk it off to forced conscious expansion: Tune in, freak out, get beaten."
Hunter S. Thompson
Ad astra per aspera
Nihil curo de ista tua stulta superstitione.