createStore vs configureStore

store.js

// Redux STORE
const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
const prodMiddleware = [thunk, immutableStateInvariant, serializableStateInvariant]:
const devMiddleware = [thunk];
const middleware = process.env.prod ? prodMiddleware : devMiddleware;
const enhancer = composeEnhancers(applyMiddleware(...middleware));

const ReduxStore = createStore(rootReducer, enhancer);

// RTK STORE
const RTKStore = configureStore({reducer: rootReducer});