I'd like to hear your opinion for 2 different cases :
Definitely faster on React Native if you have a hybrid team especially many of them are web developers. RN components are mature enough for most of requirements of an app.
In case 2, just ask them. Someone who is experienced with both can tell you which tool they'll be quicker with.
IMHO, React Native (with Redux) is always faster, but I'm an FP person, so I'm biased.
As per my experience, it depends what kind of features you're going to build. If the UI/UX and features are too fancy, the Android Native is going to get you things done faster than the React Native. Because Android Native has a rich community and 3rd-party libs. React Native would lack on that part.
If the app is not that rich UI/UX and features point of view, React Native is your best option.