Apple's iPhone 6 and iPhone 6 Plus were unveiled during a special event on 9 September, meaning the iPhone 5s got a significant price cut.
Potential iPhone buyers will be considering whether to opt for the cheaper iPhone 5s or the newer iPhone 6, and current iPhone 5S owners will be wondering whether it's worth upgrading.
The iPhone 5s was released back in September 2013, so has been available to buy from Apple for about a year.
At launch, it would set you back from £549, but the iPhone 5s price in the UK now starts at £459.
The iPhone 6, on the other hand, was released by Apple on 19 September. It costs £539 for a 16GB model, £619 for a 64GB model or £699 for a 128GB model.
The iPhone 5s is thin, at 7.6mm, but Apple has managed to make the iPhone 6 even slimmer, at just 6.9mm. The screen is now 4.7in compared with 4in, so that's made the iPhone 6 heavier than the iPhone 5s, at 129g compared with 112g.
That aforementioned 4.7in display offers the same 326ppi pixel density as the 4in display on the iPhone 5s, so Apple has added more pixels rather than simply stretching them to fill the bigger screen.
The 5S sports a 64-bit A7 chip, but an A8 chip is found in the iPhone 6. The iPhone 5s is already so powerful that a boost won't be obvious to the general iPhone user, but the iPhone 6 scored remarkably well in our benchmark tests.
The iPhone 5s is now only available in 16GB and 32GB options, but a 64GB model was available before the arrival of the iPhone 6.
In a bit of a strange twist on things, Apple has decided to only offer the iPhone 6 in 16GB, 64GB and 128GB models, so the addition of the 128GB model has meant the end of the 32GB option rather than the 16GB model that we expected would get ditched.
Both the iPhone 5s and iPhone 6 have an 8Mp rear-facing iSight camera with an f/2.2 aperture and 1.5 micron pixels, though the iPhone 6 does have some tweaks and improvements.
Apple has added new 'focus pixels' to the iPhone 6, for example, which means you'll get much better autofocus. There's also digital image stabilisation and slo-mo recording.
