Not seen either of them so I don't know the extent of their differences, but Reeves' mother was Sarah Kent and Alyn's was Martha
Adventures of Superman also had Kellogg's commercials which could be in-universe made by the Daily Planet (since they also star Perry and Jimmy), but there'd have to be a reason why they say "Clark Kent, the star of Superman", and why they act like he has x-ray vision. Maybe their own tv series where he's secretly portraying himself? Which could also mean the actor playing Superman in I Love Lucy is Clark Kent, not George Reeves