Mad Hippie Vitamin C Serum vs Vichy Mineral 89

I bought the Mad Hippie Vitamin C serum as my first vitamin C dapple (after a few recommendations here). I've been on tret for about 3 months, along with other various good quality skin care items, but had seen basically 0 improvements of any kind. Early for tret anti ageing results, but still, my skin texture and moisture just sucked, no matter what I tried and layered. However this product seems to have like, INSTANTLY worked

I really like the Vichy Mineral 89 serum with the Cerave in a close second. The Vichy is more traditional serum texture while the Cerave texture is thicker than a traditional serum, but much lighter than a moisturizer.