score:5
Not exactly an expert but I don't think the two religions can be more dis-similar.
Zoroastria is a revealed religion, it has a distinct founder and prophet who historically existed (although whether really a prophet is another question). It's a monotheistic religion - arguably the first.
Hinduism is a collection of much older (potentially several millenia older) local religions with no original prophet or founder none to history.
The rituals, commandments and activities of most religions end up being pretty similar - there are only so many natural forces you can attribute to a god and the laws you need to live peacefully in a city have been pretty much the same for the last 10,000 years.