I have the bigger case and it fits the following:
All the SK style maps (around 100) with room for another 20 at least.
Dice tower
Hip thingie
Charts
Informational counters
Three spiral bound rulebooks (Chapters A-G, Chapter H, All the rest)
Miscellaneous stuff: dice, magnifying glass, tweezers, thread, notebook, OBA marbles in a bag
I'm sure there's a few other items and I still have a pocket or two that are empty. From a compactness and portability POV it is great. See me at ASLOK or Albany for the grand tour...
Steve