Many factors influence coaster costs. It is very difficult to compare apples to apples. While there are many technical reasons why one coaster may cost more than another, the biggest difference can be just what is included in the reported number. Parks may or may not include items not supplied by the coaster maker such as foundations, themeing, park overheads, land costs, area paving, landscaping, runoff control, permits, etc.
In the case of the 2 coasters you list though, the larger coaster should cost 50-100 percent more than the smaller one. The cost of a coaster goes up almost with the square of the heights and lengths. Not only does the structure get larger, but it must get much stronger as height goes up.
*** This post was edited by Jim Fisher on 1/28/2002. ***