Different from, different to or different than ?

The adjective different means ‘not the same’. When we compare two or more items, it is usually followed by from. We also use different to, especially in speaking:

Adam is so different from/to his brother.

This house is very different from/to your last one.

In American English it is also common to say different than:

This tea tastes very different than the one I usually drink. (or … very different from/to the one I usually drink)

In British English, people often say different than before a clause, but many speakers consider this to be incorrect:

His accent is different now than before he went to Australia. (or … different now from before he went to Australia.)