I recommend the slightly alkaline version amidst the mild acidity.

These days, many mildly acidic 5.5 products are coming out, but I heard they are actually harmful for oily skin. They say sebum isn't removed effectively. So, I was looking for a mildly alkaline cleansing foam, and it turns out the product I was originally using is actually mildly alkaline. Since it is a La Roche-Posay product, it is gentle. It doesn't feel like it doesn't clean well; on the contrary, it leaves a squeaky-clean finish. Those with dry skin might find it a bit drying.