The above question is currently arising on the Internet. Answer:
A highly intelligent person does what it says on the can — carries out ordinary jobs but does so with such ease that she achieves high social status more often than not.
On the other hand, an intellectual, quite often not as intelligent as might be expected — Einstein was a good example — try to tackle jobs which even highly intelligent individuals may balk at, or indeed find of no interest. If she succeeds, however, and enough of the highly intelligent approves, then she may also gain high status. But until then an intellectual may have no social status worth speaking of at all.
Few highly intelligent persons die without making some mark on the world. Many intellectuals die without making any mark at all.