With regard to AF447, the trim tank was full, and that meant that the CG was at or near the aft limit which provided lessened trim drag.
The down side of that CG location was that once stalled, it was easier for the aircraft to reach extremely high angles of attack.
Maybe the trim tank was full but i believe the CG was not near the aft posn. Due freight in fwd hold (i am told)
In the airline I flew the 332 with the trim in the cruise was around 38 to 39 which is getting nearly full aft.