Barry said Fury's awkward unorthodox style could trouble Wilder early on, adding the Englishman deserved credit for even getting into the ring with the American after his problems with drugs and mental illness since he beat Klitschko in 2015.
"For him to reinvent himself to fight the most dangerous fighters in the world at the moment is nothing short of a miracle.
"Do I think he can do it? Anything is possible in boxing, but do I think he can spend 36 minutes [with Wilder] and not get clipped? No, I don't."
Parker, who keeps in regular contact with Fury and Wilder, was more diplomatic, saying: "I'm on the fence on that one - I've been there from the beginning and still am. On one side, you have power, and on the other, you have boxing [ability], but I'm friends with both guys."
It was perhaps Flores who put it the most succinctly when he said: "I think it's a 50-50. Fury is a big guy but he can box and move well. Wilder has that right hand. At any given time, he can land it, and that's it."
• Patrick McKendry travelled to Las Vegas and Los Angeles with assistance from Flooring Xtra, a major sponsor of the Joseph Parker v Alexander Flores fight at Christchurch's Horncastle Arena on December 15.