We don’t know yet and won’t know whether there’s complete feature parity across all phones for NOS 3.0 until the beta is launched to all devices and, then you’re on beta. Things can change between it and the official release. I’d assume most things will be similar across all devices and they’ll be ½ things that might be unique to 2A vs 2. Or, 2 vs 2A.
So in summary, we don’t know.