Doug and Eric (the nerdy and wimpy lead characters) Patti and Donna (the lead characters' love interests) Skeeter and Kelso (the lead characters' weird best friends) Roger and Hyde (rebels) Beebe and Jackie (snobby rich girls) Fentruck and Fez (foreign exchange students) Judy and Laurie (the lead characters' older sisters) Theda and Kitty (the lead characters' sweet, yet embarrassing mothers)

Both shows' hangouts are eating establishments ('Doug' has the Honker Burger or Chez Honque in the Disney version, and 'That '70s Show' has The Hub.)

Both shows have fantasy sequences.

One episode of each show is kind of similar. In the episode of 'Doug' titled "Doug Clobbers Patti", Doug beats Patti in a game of basketball. But in the episode of 'That '70s Show' titled "Battle of the Sexists", the plot is kind of reversed, Donna beats Eric in a game of basketball.