Internally there are big differences. Better improvements to the home button (better pressure sensitivity) a better processor, a more powerful “dual-lens” camera, improved battery life and no headphone jack.
There are rumblings pertaining to iphone 7 ‘s absence of a headphone jack. Apple speculates that the headphones may plug into the lightning port area. Consumers suspect headphones would connect through blue tooth technology. It also comes in various colors and a beginning size of 32 GB.