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However, CPFP leads to involving other unrelated utxo(s) which can mean an unwanted/unexpected deanonymization. With RBF, you can just use the already exposed change output for paying higher fee.
Devil is in details, but more or less RBF means similar privacy loss as 1 input, 1 output CPFP. Basically you give more hints to the world in a different ways which output was for recipient and which was change.
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True. It depends on the particular case. That's why I don't say one or the other. Both mechanisms are useful in specific scenarios.
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