Can't see how people think Pacino only plays one character.
Manic in Dog Day Afternoon, Cold and calculated in Godfather, Nutter in Scarface, Paranoid in Serpico, Cool in Carlitos Way,
Warm in Frankie and Johnny, Scene stealing in Dick Tracey, Gullible in Donny Brasco, etc,etc.
Pacino is a fantastic actor who plays the stage as much as the movies.
Although Pacino has made some fantastic films, De Niro best ones have been better.
Godfather II and Heat obviously not included but Taxi Driver, Deerhunter, Once Upon A Time in America,Raging Bull and Goodfellas are all amazing.
Therefore the best out of Pacino and De Niro is....................