The slight difference in usage between 'baru' and 'baharu'

Menurut Kamus Dewan Edisi Keempat, the word 'baru' and 'baharu' can be used to mean 'new'. For example, a new car can be rendered 'sebuah kereta baru' or 'sebuah kereta baharu.'

The word 'baru' is used when it means 'just'. For instance, 'I just e-mailed him the file he needed.' can be worded as 'Saya baru meng-e-melkan fail yang diperlukannya kepadanya.'

Recently in Malay is 'Baru-baru ini' and not 'Baharu-baharu ini.'