Does listening to a stream using Provider works same as listening once in initState() without the Provider

Question

From the state changes point of view and firebase cost, does using

data = Provider.of<MyModel>(context);

Or maybe Consumer() in build method, with a StreamProvider. works same as

@override
  void initState() {
  data = readDataFromFirestore(); // Listening my Stream here and using in build method
  super.initState();
}

static Stream<MyModel> readDataFromFirestore() async* {
  // stream code here
}

and then use StreamBuilder in build method.

What if we have multiple listeners of same stream. What is the best practice from firestore cost and optimisation point?