Any difference quickly disappears once you take into account various accents and dialects. It's a lot like pin and pen. They're technically not by the strictest

Any difference quickly disappears once you take into account various accents and dialects. It's a lot like pin and pen. They're technically not by the strictest sense of the word homophones because there should be a slight difference in how you pronounce them, but in practice, there is no difference.