oy, my friend, i think you're going to have to be a little more specific with your questions. everything LMP said is true, and it would weigh a ton as well. epoxy is heavy, and leaving dry fiberglass anywhere in a ski significantly reduces it's strength once it's made. foam skis are best from day 1, but wood skis have consistancy and durability after a comparable 10 days.
someone above said wood skis are stiffer. true sometimes... realize that there are hundreds of species of wood used to make various skis, and all have different properties and densities. also, how the skis is made makes a big difference... for example, the k2 PE and fujatives use the exact same species of wood, but the fujatives are a much softer ski simply because the core is a bit thinner (and some other minor factors.) there's LOTS of variables that can make a ski good or bad, so don't make the mistake of attributing a pre-determined opinion of wood v. foam to determine whether a ski is good or not.