Prisoner’s Dilemma relies on causality, Newcomb’s Paradox is anti-causality.
The contents of Newcomb’s boxes are caused by the kind of agent you are—which are (effectively by definition of what ‘kind of agent’ means) mapped directly to what decision you will take.
Newcomb’s paradox can only be called anti-causality only in some confused anti-compatibilist sense in which determinism is opposed to free will and therefore “the kind of agent you are” must be opposed to “the decisions you make”—instead of absolutely correlating to them.
The contents of Newcomb’s boxes are caused by the kind of agent you are—which are (effectively by definition of what ‘kind of agent’ means) mapped directly to what decision you will take.
Newcomb’s paradox can only be called anti-causality only in some confused anti-compatibilist sense in which determinism is opposed to free will and therefore “the kind of agent you are” must be opposed to “the decisions you make”—instead of absolutely correlating to them.