Betaine salicylate

Hey R & P! Got another question for you:

How well does betaine salicylate work compared to salicylic acid? Are the two comparable in regards to preventing blackheads and controlling sebum? More specifically can Cosrx's 'BHA Blackhead Power Liquid' (4 % betaine salicylate, pH 4.0) in theory work just as well as Paula's Choice 'BHA' (2 % salicylic acid, pH 3.2-3.8)?


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