I know I'll digress a bit but the change in MJ's voice from 1999 to 2001 is really big.
The MJ & Friends concerts had, according to me, the best sounding live vocals from MJ I've heard since the Bad Tour. I know he didn't do a lot of live singing on these concerts but when he did, whoa. His voice was crystal clear!
Listen to the "Bataaay" on 3:01. So effortlessly and so high in range without any strain that we heard so much on the history tour. The acapella part here was so great. The best YANA acapella part ever imo. Even the " I love you Korea" at the end was awesome haha
Over to Exhibit B. This performance of She's Out Of My Life is on par with the Triumph Tour. Starting with the Bad Tour, he always sang " I keept my love for her like
Deep Inside", going into falsetto on the deep line. Here he sings it with his full voice and does so powerfully.