Wish I had the clip to support this, but the Dan Lebatard Show has been asking the question of '86 Celtics vs. '97 Bulls. Yesterday, they asked Barkley this.
Wouldn't ya know it? Charles says the Celtics, cause they'd mangle the Bulls down low. Rodman can't guard McHale AND The Chief, DJ could slow Mike down a bit, and Scottie would be no match for Larry Legend. He also said '85 Lakers would win that too (Kareem, Magic, and Worthy, with Michael Cooper), and not to sleep on the '03 Spurs of Duncan, Robinson, Manu, and Tony Parker.
Charles played against 3 out of those four teams: The Showtime Lakers, that Celtics squad, and the 97 Bulls. I trust him.