There is variation in the lexicon, but it is not dialectal.
Older speakers report that, formerly, when there was also a Kristang community in the Trankerah area of Malacca town, there was lexical variation differentiating the Trankerah variety of Kristang from that of the Banda Hilir area.
The question of urban variation does not apply today, as the huge majority of speakers reside in the same 28-acre area in Banda Hilir.