The difference here is JA ADVISED JB already he was going to ask that, giving him a chance to have it put before the Judge, where JB would just ASK that question of the witness, knowing that something will be sustained, just to get it out in front of the jury, whether the witness is allowed to answer it or not. That is the difference between some things JA does and JB does, JB has snuck many types of questions in like that all along. Once the bell is rung, the jury does not forget, whether the questions is sustained or not. IMO, MOO, etc.