Here’s the link you were looking for @Mike
Basically both improved strength the same but HCl had a minor improvement in lean body mass. That may be due to HCl being absorbed faster you can get the same effects from mono but it may take a bit longer (the study was only 4 weeks long and mono has been shown to improve body mass in previous studies).
Also a good read:
https://medium.com/@anthonyroberts/everything-wrong-with-creatine-hydrochloride-424a8ceea6a4