Creatine hydrochloride is a form of creatine with many claims about its improved absorption and overall efficacy compared to creatine monohydrate. However, these claims are based on speculation and have not been tested to verify their authenticity. At this moment, no evidence exists to suggest that creatine hydrochloride is more effective than creatine monohydrate.
Reference: Caldwell, J. L., Chambers, K. A., Moore, D. C., Yates, C. R., & Bloomer, R. J. (2018). Ingredient Dosing within Dietary Supplements: Are You Getting Enough? Acta Scientific Nutritional Health, 2, 54-63.