Yep - need to be Sapphire ones or they will look slanted when they're fitted because the panel they bolt up to on the hatchback are vertical like the Sapphire, however, the lenses are slanted on the hatchback to match the shape of the bodywork.

You'll also find that there are two slightly different shapes for Sapphire rear panels - one has a slanted lip at the bottom below the number plate, and one has a horizontal lip below the number plate.