There are at least 2 forms of Loripetalum. The pink flowered, dark leaf one and a white flowered variety with greener leaves. I assume the white flowered one is the original species but have not checked to see if that's correct.
It will be interesting to see if this is a branch that has reverted to white or maybe 2 plants got mixed in a single pot when they were first potted up years ago and the white one has been selectively suppressed to favour the pink flowered one?