Probably the same thing. We go to Yellowstone every year and buy BIG duffles there. It has to be 36" long however. This is thicker material and with the plastic glue ons such as oar locks foot bar holder plus the D rings and handles, it does not fold up that small. You got to remember this boat is 8 feet long, And it is specially hard if it is cold. I suck all the air out of mine, to make it as flat as possible with my LVM pump. Something else to think about.
Now if someone could come out with a Rolling Duffle with larger wheels for ground clearance and no plastic bottom so it could fold up small...I would be all over that.
This is complete Assault with foot bar, seat, sidebags and apron.

AND, the XX will also fit into this same bag minus the bags.