They are both stock skis. 2003 and 2004 used the ones with the aluminum "saddles". In 2005 they went to the all plastic skis. They are called saddle less. There were three different keels on the all plastic skis. I don't remember if the ones with the saddles had different keels. You should be able to order the carbides by the application (year, make and model). If you need more help I can get my manual out and get the details on the skis.
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I should have added that I believe they use the same carbides as long as the keel is the same. The studs on the carbides will be different lengths depending on the keel. 2 of the bolts (2nd and 5th from the front) in the aluminum saddles are used to hold the saddle to the ski and don't need to be removed to get the carbide off.