But in practice, one pairing has just a bit more magic in it than the other.
Theres also Birdie (Nixon/Linney), born into Southern aristocracy but married, puzzlingly, to Oscar.
Nixons Regina doesnt pack quite the same punch unless shes yelling at someone.
Credit: Joan Marcus
In her best moments, Nixon is all ice, where Linneys Regina is fire.
By contrast, Linneys Birdie just doesnt seem as beaten down and frail from years of Oscars abuse.
Its still a treat to watch these masters at play, along with the rest of the vibrant cast.
