Well, I called Zeiss customer service this morning and here is the info I got regarding the subtensions on the #20 and #4 reticles. First off this info is what they have listed for the 3-9x40 as the lady I spoke with said the numbers she has are the same for the 3.5-10x44, which is definately not the case at least for the #20/Z-plex. I explained this to her and all she could say was that this was the information that she has available, which is fully understandable in her case. Anyway here is the info for the #20 and #4
3-9x40 #20 (Z-Plex):
Width of Heavy Line @ 100 yds: 3x = 4", 9x = 1.3"
Width of Thin Line @ 100 yds: 3x = .666", 9x = .222"
Space between Heavy Lines @ 100yds: 3x = 24", 9x = 8"
3-9x40 #4:
Width of Heavy Line @ 100 yds: 3x = 10.8" 9x = 3.6"
Width of Thin Line @ 100 yds: 3x = 1.1, 9x = .5"
Space between Heavy Lines @ 100yds: 3x = 50.4", 9x = 17"
Based on this info it would appear that the spacing between the heavy lines on the #4 is similar to the wider #20 Z-plex in the 3.5-10x44.