These 3 expressions have the same meaning, but different from is the most common in Australian, British and American English. Different than is mainly seen in American English, and different to in British English. Different than and different to are often regarded as incorrect because things differ from each other (they don’t differ to each other or differ than each other). However, all 3 expressions have been used for centuries. Although all are acceptable, different from is regarded as less controversial and more correct.