iPhone 6 vs. 6s: Four main differences

In this file photo, a woman tries out an Apple iPhone 6S at an Apple store in Chicago on Friday, Sept. 25, 2015. (AP / Kiichiro Sato)

At first glance, there isn't much to tell the iPhone 6 apart from the 6s. And yet, Apple's latest smartphone does offer a few significant improvements, especially on the photo and video side.

3D Touch technology

Just like its predecessor, the iPhone 6s has a 4.7 inch Retina HD display (1334x750 pixels), now equipped with 3D Touch technology. This proprietary tech, a derivative of the Force Touch found on the Macbook and Apple Watch, allows users to control various functions depending on the pressure applied to the screen.

New cameras

Apple needed to take a giant step forward with its photo capabilities, so the iPhone 6s now has a 12MP main camera (iSight) that is a significant step up from the iPhone 6's 8MP. It also now includes the Live Photos feature that captures the moments just before and after your picture and sets it in motion with just the press of a finger. As for the front-facing camera (the FaceTime camera), it's been upgraded to 5MP and can film in 1080p.

4K video

As for video, Apple has introduced 4K filming (3840x2160 pixels) as well as slow motion capture at a rate of 120 frames per second in HD (1080p). You can also take 8MP photos while filming in 4K.

A new color

In addition to silver, space grey and gold, the iPhone 6S (as well as the 6S Plus) is also available in a new color, pink gold.