Ok i understand. A 34oz heavy clothes small duffle would be great :-)
Your thouhts about the 073 are probably right. Better waterprofness is always a good point and when laying on the ground it makes perfectly sense to cover that part with the thin clothes. On the other hand, I will use it mainly indoor, in the car, train, airplane. In the gym, office, plane my biggest concern is always the ground, because you teare it, squeeze it rub it. So the bottom and the edges have to be built really strong for my purpose. At the end I have no doupt, that the 22oz rugged twill also is a coverage against rain and wetness in general.
The last thing is, do you know how the black 22oz rugged twill ages? I mean, I've seen many pictures from vintage tan and otter green twill. I'm curious how the black twill's patina looks like after 3-5 years.