Difference between Unostentatious and Unpretending

What is the difference between Unostentatious and Unpretending?

Unostentatious as an adjective is not ostentatious; simple; unpresuming. while Unpretending as an adjective is unpretentious, real, genuine

We hope you now know whether to use Unostentatious or Unpretending in your sentence.