Abalone in the tube is a see-through hot pink with no shimmer. It has cool undertones and just barely gives my already pigmented lips a slight tint. Au Rose is a medium pink with subtle gold shimmer. It is much more pigmented that Abalone but still pretty sheer. I prefer this shade or Abalone just because it adds a touch more color to the lips and brightens them up a bit more.
Left: Abalone Right: Au Rose