Apple unveiled its latest flagship smartphone, the iPhone 5S, an event in San Francisco on Tuesday.
The firm clearly is hoping that iPhone 5 users will find its latest handset irresistable and will upgrade their year-old smartphones early, and is clearly looking to woo business customers with its increased security measures - but some might argue that Apple hasn't changed enough to make it worth paying another £550 wedge of cash.
We've put the handset's specifications up against those of its predecessor to see whether you should go out and save your place in that growing queue outside the Apple Store.
Measurements, weight and design
iPhone 5S: 123.8x58.6x7.6mm, 112g
iPhone 5: 123.8x58.6x7.6mm, 112g
The iPhone 5 and iPhone 5S are identical in size and weight, despite Apple's latest flagship smartphone having an improved camera and a faster chip under the bonnet. This is not a bad thing, as in our iPhone 5 review we pointed out that the handset is comfortable to use over long periods.
However, there are some slight design differences. While the iPhone 5 was available in only black and white, the new iPhone 5S will also be available in a champagne gold flavour. Although in our opinion it looks a little tacky, the gold version likely will appeal to those who like a bit of bling. Apple has also discontinued the black model, replacing that with a new Space Grey model.
iPhone 5S: 4in 640x1136 resolution 326ppi Retina display
iPhone 5: 4in 640x1136 resolution 326pp Retina display
There's not much to compare about the displays, as Apple's iPhone 5S sports the exact same screen as its predecessor, despite earlier speculation that the firm planned a larger display for its latest flagship smartphone.
Still, it's hard to complain, as Apple's Retina display remains among the best in the mobile market.
iPhone 5S: Apple 64-bit A7 processor
iPhone 5: Apple dual-core 1.3GHz A6 processor
One of the major upgrades in the new iPhone 5S was processing power. Apple has swapped out its dual-core 1.3GHz A6 processor found in the iPhone 5 for its new A7 chip based on 64-bit architecture, making the iPhone 5S the world's first 64-bit smartphone.
While we have yet to test the raw power of the iPhone 5S, the upgraded chip apparently means that Apple's latest flagship handset will operate up to "five times faster" than its predecessor, with Apple claiming that the phone will boast Mac-like performance. This should make for much faster multitasking and document creating, and we'll be sure to put this to the test in our full review.
This A7 chip is paired with Apple's new M7 motion coprocessor, which continuously monitors the accelerometer, gyroscope and compass to offload workloads for improved power efficiency and means that while offering better performance and capturing subtle movements, the iPhone 5S should boast battery life to match.
iPhone 5S: iOS 7
iPhone 5: iOS 6, upgradeable to iOS 7
This is a bit of an unfair comparison, as users of the iPhone 5 will be upgraded to iOS 7. However, those who pick up an iPhone 5S won't have to face the possibility of bricking their smartphone or waiting hours for the software to install, so that's a definite bonus.
What's more, iOS 7 is a big improvement on Apple's iOS 6 mobile operating system, with its redesign and 'flat' look bringing a whole new feel to the phone. This was Apple's first major iOS upgrade since the first iPhone was announced, and was much needed.
Chief among the improvements found in the iPhone 5S are a new Quick Settings menu accessed by swiping up from the bottom of the screen, a redesigned camera interface, a new look to email and a completely revamped lock screen.
iPhone 5S: 8MP rear camera with autofocus, dual LED flash and 1.5 micron pixel size, 1.2MP front-facing camera
iPhone 5: 8MP rear camera with autofocus and LED flash, 1.2MP front-facing camera
Along with the processor and addition of a built-in fingerprint scanner, the biggest improvements in the iPhone 5S are in the camera department.
Despite looking pretty much the same on paper, the iPhone 5S improves the camera of the iPhone 5 with a 1.5 micron pixel size, which Apple claims will let more light and colour into images. The single LED flash has also been upgraded to a dual-LED flash, comprised of 'cool' and 'warm' compontents.
Apple's latest flagship smartphone also adds two-times faster autofocus, faster photo capture, automatic image and video stabilisation, and better dynamic range.
iPhone 5S: 10 hours' talk time
iPhone 5: Eight hours' talk time
While most were hoping that Apple would vastly improve the battery life of the iPhone 5S, Apple has given it only an additional two hours of battery life, with the handset said to last 10 hours when connected to 3G.
This is an improvement on the iPhone 5, but perhaps it's not quite enough of an update.
iPhone 5S: 16GB, 32GB or 64GB storage
iPhone 5: 16GB, 32GB or 64GB storage
Despite speculation that Apple would launch the iPhone 5S with a 128GB model, the handset will instead be available in the same storage versions as its predecessor - 16GB, 32GB or 64GB.
So, while the iPhone 5S doesn't look like much of an upgrade compared to the iPhone 5 in the flesh, the handset's new 64-bit A7 chip, Touch ID sensor and upgraded camera may just convince buyers to cough up £550 for an early upgrade.
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