Originally Posted by crgildart
I would think that the base material on both Head and Dynastar would be no different when new.
Yes and no. Truth is that there's only few (if I remember right 2 or 3) manufacturers who produce base material. So yes, base material is basically same on all skis. But there's another issue. Base material comes in big roll, from which it's cut to thin base sheets in factory. It really matters from which part of that big roll material is cut. Normally top part is used for low end skis, and part in middle is used for race service skis. Which part, and how things are cut are factory specific so that's basically reason, why you actually have two same pairs from same company but they have different base. With xc skis, where glide is much more important then with any alpine skis, you have 20 or 30 different (talking about race service skis) bases (even though they are all cut from same block) where some of them are great for dry and cold snow, others work well on wet snow etc.
With GS or SL skis, noone is doing glide tests, even in WC, since glide is least of factor for great GS/SL ski (SG and especially DH are different), so I don't think in this particular case, base of ski has much of importance. There's really too many factors involved in ski being fast, so it's impossible to say it's just base. But if someone likes it or not, Head is not really known for great skis, at least when it comes to race service skis, and somehow I don't see why things would be much different with store/recreational skis either ;)
And there's another issue with all this. What does "it's not as fast as Dynastar" really mean? Did you or your kid do glide tests, or it's just "I feel they are not that fast". Race times are not factor to say ski is fast or not. At least not directly. First, some people have feeling for skis, some don't. From my own experience, I was working with guys and girls competing in WC (and not being all that bad), which had completely no feel for ski, but on the other side, I had racers, (also not that bad in WC) who didn't need any of glide tests to tell which ski worked and which didn't. Personally I don't need watches, glide tests etc. to tell which ski works and which doesn't. Few meters of gliding is enough to tell if it works or not. But this things come with years of testing, and with a bit of feeling. And it depends on people.
Second, as I wrote, there's way more then just base to tell if SL/GS ski works. Skis are more complicated then they look, and ski with exactly same measurements will feel different. Maybe Dynastar skis fitted your kid's sytle, and Head don't, so this could be reason. It's just too much to easily say "this are slow, these are fast".