Harry Potter 1 - US - UK Versions

[BozQ]

US is about the only major country in the world that uses "Sorcerer's Stone"
Considering this is largely a British Production to begin with, I'd say the "Philosopher's Stone" is the original one.
I honestly wouldn't bother to hunt for the US version so intentionally. The differences are very minimal, affecting about three insignificant scenes in the whole movie. The integrity of the film remains the same. Hardly affecting the rest of the seven movies.