G'day Scott,

Yes, that's correct, but manually pumping air into a bonded self-inflating mattress can cause the fabric to separate from the foam.
Any extra air should be added with caution.

G'day James,

There's no R-Value on these mattresses as Darche have yet to test them.
I'm not sure if its something they're planning to do in the future, as their All Terrain Mat also hasn't undergone ASTM testing.

G'day Imran,

The differences really come down to the materials and valves.
The All Terrain Mattress is a much more heavy-duty option, with PVC outer and larger heavy-duty valves.  Its designed to go its swags and for more rugged adventures.
The Kozi is great family camping mattress option aimed more for car camping - tents and stretchers.  It has a softer stretchy outer fabric, so comfortable to sleep on without a sheet, etc and a slightly softer internal foam, with a much smaller pack size.

G'day Rachel,

They're semi bonded, so will be fine to store rolled up.

G'day Rachel,

Generally, it is best practice to store a fully bonded mat in the unrolled position with the valves open, however, reality dictates this isn't always possible, and the majority of all self-inflating mats will be stored rolled up. A semi-bonded mat is less likely to have ongoing issues if stored rolled up as Lauren suggested. 
If you're not able to store it unrolled, then popping it out and letting it inflate, then packing it away once a quarter will be just as effective.