De Niro, not because he's better, but because Pacino tends to do the same thing in his films - if you look at his career, he has had three phases: Violent Pacino; Shouty Pacino; Tired Pacino. Potentially, I think he could be better and has a better range if he bothers, but he hasn't.
So essentially, this is a protest vote to get Pacino to cop on to himself - I'm sure he reads the site, though I don't know if he'd bother with the off-topic section.
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