Catlike helmets have at least 2 design features that I like a lot. Firstly I wear a Catlike Kompact helmet which gets the "kompact" name because it uses higher density foam than other cycle helmets which isn't as thick, hence compact. The Whisper helmet apears to be the same and this is a feature that makes Catlike helmets stronger. The other important feature, which is what first atracted me to Catlike helmets is the fully encompasing micro-shell. Every nook and cranny has some shell covering it and this is a VERY important feature that gives the helmets a lot of strength when compared to flimsier designs.
Basicaly foam has not structual integrity of its own. It only works in compression IF it has a shell to compress against. Many modern designs expose the foam which will just crumble the first time it see's the pavement and if it crumbles its not compressing properly to cushion you from the sudden impact of a fall.

Catlike helmets have reasonably good ventilation while still being fairly substantial helmets with considerable strength. I have some design background and I have looked into helmet design in the past. Catlike helmets look very much to me like a safety minded engineer is having a large say where as much of the competition looks like its been designed for ventilation first, safety second.

Regards, Anthony