أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Both the Britishers and the Americans speak equally well. It's just that they both have a very different accent. And I'd go on to say that their accents, and spellings in some cases, at times, appear to be exactly opposite each other.
Language is a matter of expression. Therefore, the one who can express themselves clearly speaks better irrespective of their origin.