Upgrades have also made over to the flash, with the iPhone 5S being fitted with a dual-LED offering to make night time shots brighter and clearer, as well as bring a more natural tone to shots. This puts it above the iPhone 5C that comes with only a single LED light.
In order to highlight the differences in cameras, we've taken a variety of shots so you can compare them side by side.
The larger pixel size is immediately obvious, with the image taken by the iPhone 5S coming out a lot brighter than on the 5C. More detail is also noticeable on the image taken by the 5S, with more colour appearing in the sky.
Contrast is slightly higher on the 5S rather than the iPhone 5C, with markings in the paint work being more prominent, and water droplets also showing up better. Zoomed in, text also comes out clearer on the 5S.
The same differences found in the postbox images are also found in the images of the cathedral. It is clear that there is more detail in the brick work, and the contrast level is a lot higher. Zoomed in, edges of the building are a lot crisper.
Throughout our flash photography we found that the iPhone 5S generally produced more in focus shots, thanks to the dual-LED flash that sits next to the camera and improved processor speeds. When comparing photos there is a slight difference, although it's not as huge as you might think.
The larger pixels in the iPhone 5S come into play in darker scenes, allowing a lot more light to hit the sensor. This allows the 5S to produce a brighter image, with far more detail being captured; it is possible to make out brick work on the building opposite in the image taken by the 5S, but not the 5C. Light streaks are also largely eliminated.
A lot of the talk surrounding the upgrade of the iPhone 5S from the iPhone 5 was the inclusion of the new A7 chip, bringing across a laptop-esque 64-bit architecture. Right now this means very little, but as time goes by and as apps are optimised to suit the newer chip, expect to see bigger and faster apps.
The iPhone 5C keeps the same chip that is found in the older iPhone 5. This follows a more standard chipset, although one that is expected to be replaced by 64 and eventually 128-bit chips in flagship models. Even Qualcomm have recently launched the budget Snapdragon 410 64-bit chip.
This should mean that iPhone 5S comes with a greater life span, as it will be able to run the bigger and more demanding apps that we are likely to see in the future.
Flicking through the home screens and the differences in terms of speeds aren't all that noticeable, but for everything else there is a definite disparity. Web browsing, gaming and downloading is a lot faster on the 5S.
- Read our in-depth iPhone 5C review
We noticed that apps needed updating on both handsets, and the iPhone 5S managed to download four apps before the 5C had downloaded two. A check of the app sizes even showed that it wasn't due to the file size, as the iPhone 5S had downloaded larger files.
Web browsing over Wi-Fi was a lot faster too. There may have only been a slight delay in loading basic mobile sites, but the delay was a second or two when browsing full mobile sites. Gaming was also faster on the 5S.