As you can see, there are really very few differences between Standard British English and Standard American English. Nevertheless, the largest difference is probably that of the choice of vocabulary "truck" Am. Engl. or "lorry" Brit. Engl. and pronunciation . There are also divergences in spelling such as "color" Ame. Engl. "colour" Brit. Engl.; grammar "Do you have a car?" Ame. Engl. vs. "Have you got a car?"Brit. Engl.
What is more correct British English or American English? Well, both of them are totally correct, but the point is to be consistent in your usage and preference. Nowadays, we may be more influenced by American English due to movies, music, ... but all of us should know both standard English.
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