You guys aren't even listening to the question! He's asking if different lengths of the SAME model are different. For example, if you flexed 167, 172, and 178 Line Chronics, would they all be the same? or would they get stiffer as they got bigger. The answer is that they will all be the same because they all use the same core in different lengths. The exception might be 4FRNT because their different lengths of the same ski are scaled so that they all ride the same.