Very well.
The same prayers chanted by Iranians have a typical Farsi accent. That is frankly new Arabized Farsi. Post conversion to Islam. You can hear it very clearly in some of the videos posted by the other members that were not from India.
It is very common in group prayer for an Indian Parsi priest to correct an Iranian Zoroastrian mobed. Either in intonation or ritual.
It takes a child (at the age if 7-9) about a year (at least 6 months in a rush) of going to a priest and being taught the basic set of Kusti prayers before the child's Navjote (Iranians call ir Sudreh Pooshi) ceremony. In which it is not just the words but how to say them (pronunciation and cadence, rhythm) that is drilled into the child for life.
The video I shared is made as a trailer for a book by a Hindu author, his and his publisher's idea of how it should sound fir dramatic effect. Hence probably the modern middle eastern touches.
Some authentic Zoroastrian prayer videos ...
Cheers, Doc