Well, for one thing it's the only new shade this year, as the other three were also available for the iPhone 15 Pro line. It's also a slightly more unusual color in general than the other options.

The iPhone 16e is out and about, but if you want to know which colors the phone is available in before you preorder then ...

The iPhone 15 is Apple’s one-year-old model, which wasn’t a flagship to begin with and omits many features to hit the price ...

The iPhone 15 models don't look notably different from the iPhone 16 models, except for the color options. Apple did not make major design changes, but the iPhone 15 models do not have a Camera ...