No comparison - but I did check, and the Big Agnes 60x20 Clearview mummy pad weighs virtually the same (11.5 v. 12.0 ounces) as the Kooka Bay 60x20 mummy pad, so I'd guess the materials are about the same? This assumes the Kooka Bay pad is not insulated; if it is, then the BA comparison is not apples-to-apples. The Kooka Bay website is not terribly informative.
Negative on the materials being similar. The BA pad is just a plastic sheeting material, no threads or reinforcement in the material at all. The Kooka pads are nylon, which should lend them to being more durable.
The weight is the same because the valves on BA pads are heavy, machined from solid brass, tougher maybe, but certainly not light. Thus, the BA pads use weaker material and a heavier valve, while the Kooka pads use a ligher valve (ala thermarest) and tougher material.
I'd imagine the Neo would be warmer, as the Kooka and BA pads should both have an R value around 1, but everyone seems to believe the Neo's R-value is somewhat questionable anyway.