А может такая ситуация...Леска имеет постоянный диаметр не зависимо от модели, производителя и т.д. А нитка даже 1,2 у одного, по условному диаметру (не знаю как по другому обозвать, понятно, что диаметр это притянуто за уши) у другого 1,5. Короче, первый раз мерили с одной ниткой (четырехжилкой, например), а второй с 8-ми. Что имеем в остатке - леска не изменилась, изменился лишь номер нитки (не условный диаметр, а только лишь номер #) и как итог на той и другой шпуле лесоемкость одинаковая.
Вот что на счет размеров пишут ЮГК
Информация от ЮГК
Different Diameters for the Same Thickness Index?
There are prescribed "standard diameters" for nylon line. For example, 0.165mm for thickness Index 1 -- no more, no less. However, slight fluctuations and a certain margin of error inevitably occur in the production process, so if a line is thinner than the standard diameter of the next thickness index number up, it can be be labeled as Index 1. This gives for a situation where "precisely Index 1" and "Index 1 verging on Index 1.5" are labeled together on the market. Moreover, for thinner lines requiring advanced manufacturing technology, the diameter becomes more and more difficult to control.
Yet even though a minimal standard exists for nylon lines, things become even more confusing when we consider the labelings for fluorocarbon and polyethylene (Dyneema) lines, which merely "borrow" the nylon standard diameters. Especially in the case of polyethylene (PE) line, the market is flooded with obviously thick products, but when you considers the higher costs involved with thinner raw line, the possibility of customers being deceived by thicker raw line used to keep costs down and improve strength (tensile strength: measured by cutting a portion of line at random and pulling on both ends) can not be ruled out. This is why a simple comparison of strength between two lines can not be made even though they may be labeled with the same thickness index.
Пруф -
http://www.yoz-ami.jp/english/line_t...ogy/index.html