Salicylic acid VS Betaine salicylate VS Willow bark extract

Salicylic acid VS Betaine salicylate VS Willow bark extract - do they work the same? I have heard efficacy of 4% Betaine salicylate = 2% salicylic acid, does it really work this way? I don't have much knowledge on this, and have not done substantial research or looked into academic papers about this yet. Based on my personal experience, I did not find Betaine salicylate or Willow bark extract to provide any significant effects in terms of exfoliation for my skin (oily, acne prone). Only Salicylic acid has helped me a lot in this area. I often see products containing Betaine salicylate or Willow bark extract say they have exfoliating properties, and that they are providing a more gentle form of exfoliation. I'm curious, if they actually do work and help exfoliate, just not sufficient enough for me / my oily skin? Are they also indeed more gentle? What do you think of these ingredients, were they helpful for you? Would love to hear if anyone has any knowledge or personal experiences to share 😊