The constructions different from, different to, and different than are all found in the works of writers of English during the past. Nowadays, however, the most widely acceptable preposition to use after different is from. Different to is common in British English, but is considered by some people to be incorrect, or less acceptable. Different than is a standard construction in American English, and has the advantage of conciseness when a clause or phrase follows, as in this result is only slightly different than in the US. As, however, this idiom is not regarded as totally acceptable in British usage, it is preferable either to use different from: this result is only slightly different from that obtained in the US or to rephrase the sentence: this result differs only slightly from that in the US