Although there is no real difference in meaning or function between the two words, there is clearly a better choice, and that is oriented. Oriented is a more straightforward, clear word form, and Garner's Modern American Usage calls orientated a needless variant.

When did orientated become a word?

The first known use of orientated was in 1964.

What does it mean to be orientated?

Definitions of orientated. adjective. adjusted or located in relation to surroundings or circumstances; sometimes used in combination. synonyms: oriented adjusted, familiarised, familiarized. having achieved a comfortable relation with your environment.