Exage 6,000 has have some lovely little FC, peredatku 4.9 :1 - and weighs 600 gr. Although I not found Max Drag for it, but think, that not less 6 kg. Exage 5,000 has have some lovely little CFC, peredatku 5.1 :1
the availability of hew "Since" in abriviature. Usually this he or (for coils dura-Ace with Japanese market) denoting type of corps - "CD", camping on E. Under shpule greater size is used Corps (and mechanism respectively) from previous size. In this case 4,000 th size or if say on Different leading place characteristics have 4,000 and 5,000 th will equal.
Judging by from this the size of the 6,000 this utterly the other mechanism compared with size of 5,000.