Well I do a lot of guitar set ups and I think that in your case there really is no way for you to tell. If the saddle height it the same for the sixth string as the first and the second as the fourth and so on then it shouldn't matter a whole lot. One way to tell for sure is to check your string height at the twelvth fret. The sixth string is usually a little higher than the first. It needs to be this way becuse the sixth string makes a wider pattern when it is sounding than does the first.