The Japanese original is a masterpiece; that is not in dispute. But the English version, due to Neil Gaiman’s script and a once-in-a-generation cast, is a separate masterpiece. It is more accessible, more emotionally direct, and arguably more cinematic for the Western ear.
In the Japanese version, Ashitaka is introduced as an Emishi prince. Japanese audiences immediately understand the historical context of the Emishi as an indigenous, marginalized people. Gaiman subtly weaves this exposition into the dialogue, ensuring Western viewers grasp Ashitaka's isolation without needing a history lesson. princess mononoke english version better
Any concerns about the English version's fidelity are largely quieted by the fact that it had Hayao Miyazaki's approval. While the director is famously protective of his work, he was involved in the process and approved the final script. He recognized that for his masterpiece to reach a wider audience, an adaptation of this caliber was necessary. The Japanese original is a masterpiece; that is