Almost 20 years ago I helped our company choose between Git and Mercurial as the replacement for Subversion. Unfortunately, I helped them make the wrong choice, Mercurial.
I say wrong because clearly Git won the war and I haven't used Mercurial since then. However, I still think I made the right choice from a technical perspective; I thought Mercurial was way more user-friendly while providing all the features and performance needed. But I guess I couldn't read the future in terms of which one would win out!