Is Differin gentler than Retin-A Micro?

I tried Retin A-Micro cream 0.04% for a few closed comedones. After using a very thin layer on a few test patches for about 4 nights a week I began getting bloody scabs, PIH dark marks and what a dermatologist told me was a mild chemical burn. It didn't purge the actual cc's but instead caused new painful, stinging whiteheads and itchy bumps! Is Differin 0.1% gel any better? Or could it also cause this reaction? I do not want more allergy-induced acne, PIH or a burn. Thanks.

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