Using fragment arguments for the entire activity lifecycle

Question

The best practice to instantiate a fragment is:

public static MyFragment newInstance(int someInt) {
    MyFragment myFragment = new MyFragment();

    Bundle args = new Bundle();
    args.putInt("someInt", someInt);
    myFragment.setArguments(args);

    return myFragment;
}

Then via the arguments is available even if the OS recreates the fragment.

Question:
The onCreate already accepts a Bundle and we can use saveInstanceState to save the data. So what is the difference with the Bundle we set in the arguments?
If I keep using the arguments during the activity/fragment lifecycle and do not use the save/restore instance bundle would that create any problems?