bɪkˈʌz ʌv ðɪs nˈɪkneɪm, pˈɛɹd dˌiːbˌiːˈɑːɹz ɪn ˈɔːklənd ɑːɹ əkˈeɪʒənəli ɹᵻfˈɜːd tʊ æz "nˈɑːnaɪdˈɛntɪkəl twˈɪnz", dᵻpˈɛndɪŋ ˌɔn ðɛɹ lˈɪvɚɹiz.
Because of this nickname, paired DBRs in Auckland are occasionally referred to as "non-identical twins", depending on their liveries.