Haunted Mansion Holiday has Imagineer Kim Irvine as the projected face of Madame Leota (lip-synching to Susanne Blakeslee's voice); Irvine's mother, Leota Toombs, acted in the original projections of Madame Leota's head.
Captain Hook had a different voice actor for Walt Disney World's version of Peter Pan Flight.
The same can be said for The Hag in the older version of Snow White's Adventures in the early 90s.
Tigger was voiced by Paul Winchell in the Walt Disney World version of The Many Adventures of Winnie the Pooh, but was voiced by Jim Cummings in the Disneyland version.
Doug Live! used about four different actors for the main five characters in the play. One of the "worst" examples was the second Doug, who was in his mid-40s, while most of Doug's other actors were in at least their 20s. (They couldn't use 12-year olds, the actual ages of the characters, to play them, as Disney World couldn't employ them due to child labor laws.)