I have a pair of Carradry panniers that I used for one tour. They have one pocket on each. I did not want to put anything heavy in the pockets, instead I always try to load my dense stuff in the bottoms of the panniers for better weight distribution with lower center of gravity. I usually use my Ortliebs which have no pockets, so with that kind of thinking (not used to using pockets) I just shoved something light weight in the pockets as an after thought.
I carry a large handlebar bag when touring, that has all the stuff I might want to access quickly, so the pannier pockets did not need to serve that role. But if I did not use a handlebar bag, then I might have used the pockets more?
The reason that I bought the Carradry panniers was that they were advertised as having a capacity of 58 liters. I was planning a trip where I would have a suspension fork on my Nomad Mk II, thus no front panniers, I was looking for more volume. That trip did not happen, but that is off topic. When I got the panniers, I was really surprised that they did not appear to have that advertised size. I estimated about 50 to 52 liters, not the 58 liters, which was a real bummer. Years later I noticed on SJS website that the Carradry advertised volume fell from 58 to 48 liters. Still larger than the Ortlieb but not what I was expecting. If I knew that they were that size, I might not have bought them, as I was comparing them to some others before I bought them.
Since I owned the Carradry, I finally tried them on a tour in 2019. I might use them again someday, but I used my Ortliebs on the tours I have done since 2019.
My point is that the Carradice people appear to have been a bit careless with their ratings.
I do not own any Super C panniers, so I do not know much about them.