Apple's iPhone 6S and iPhone 6S Plus announcement comes hot on the heels of Sony revealing its new Xperia Z5 range. Both flagship smartphones, the iPhone 6S and Xperia Z5 are top-of-the-line machines that will face off when they launch.
We've compared the specs we know so far to try to determine which will be the best buy.
Dimensions and design
iPhone 6S: 138x67x7.1mm, 143g
Xperia Z5: 146x72x7.3mm, 154g
The iPhone 6S certainly has the more compact design, being lighter and smaller in all three dimensions, although, of course, the Xperia Z5 has a significantly larger screen. If anything, we're impressed by how comparably thin these two are, considering the gap in display size.
Both devices also integrate fingerprint sensors. This is combined on the iPhone 6S with the Home button on the front, and with the side-mounted power button on the Xperia Z5.
iPhone 6S: 4.7in 1334x750 resolution at 326ppi with Force Touch
Xperia Z5: 5.2in 1920x1080 resolution at 424ppi
The Xperia Z5 easily wins the sharpness contest, with a much crisper 424ppi in spite of its larger screen, the latter of which is arguably a benefit in itself.
However, the iPhone 6S does have a not-so-secret weapon in the form of Apple's 3D Touch tech, which allows the touchscreen to detect varying degrees of pressure. This allows apps and the OS to include additional functionality based on whether the user presses harshly or gently, something the Xperia Z5 is incapable of supporting.
iPhone 6S: 64-bit A9
Xperia Z5: 64-bit Qualcomm Snapdragon 810, 2GHz octa-core with 3GB of RAM
The Xperia Z5's top-of-the-range chip is enticing and worrying at the same time. It packs some serious power but is awfully prone to overheating, as we found in our Sony Xperia Z3+ review.
The A9 chip, meanwhile, doesn't have such known problems, but is also unproven in general. Apple claimed that it's 70 percent faster than the iPhone 6's A8 chip in CPU tasks and 90 percent faster in GPU tasks, although whether it will be able to outpace the almost literally blazing Snapdragon 810 in our benchmarks remains to be seen.
iPhone 6S: iOS 9
Xperia Z5: Android 5.1 Lollipop
Fittingly, both of these top-end phones run the very latest versions of their respective operating systems. Android 5.1 Lollipop is the best yet, featuring support for manageable user profiles, anti-theft ‘Device Protection' tools and split-screen working with two apps at once.
Likewise, iOS 9 improves on iOS 8 with a new Low Power mode, six-digit passcodes and two-factor authentication for security, along with expanded core apps and updates which make more efficient use of storage space. iOS 9 apps also have access to the Metal API, which should result in better performance.
The question of which is 'better' will therefore be answered more by personal preference - and for enterprise users, which existing IT ecosystems a new device will integrate with - than by spec lists and feature comparisons.
iPhone 6S: 12MP rear with 4K video, 5MP front
Xperia Z5: 23MP rear with 4K video, 5MP front
The iPhone 6S snappers are a big improvement on those on the iPhone 6, but neither can match the huge 23MP sensor in the Xperia Z5. Sony claimed that the rear camera can autofocus in 0.03 seconds, which makes it a market leader if accurate.
At least the iPhone 6S can enjoy parity through its 4K video support and 5MP front-facing camera. These features should make both smartphones a solid choice for photo enthusiasts.
iPhone 6S: 1,715mAh
Xperia Z5: 2,900mAh
We don't know the extent to which iOS 9's power efficiency improvements will compensate for the iPhone 6S' relatively small battery, but we'd be extremely surprised if it outlasted the gigantic 2,900mAh cell in the Xperia Z5.
Nonetheless, Apple claimed that the iPhone 6S will endure up to 11 hours of HD video playback, compared with the Xperia Z5's advertised 10 hours for the same task. Sony does fight back with up to 160 hours of music playback, thrashing the iPhone 6S' 50-hour maximum.
iPhone 6S: 16GB, 64GB, 128GB, no microSD
Xperia Z5: 32GB, up to 200GB microSD
The iPhone 6S offers a wider range of internal storage capacities, and most of them are bigger than the Xperia Z5's sole 32GB drive. This would have made for an easy win, were it not for the latter's huge microSD support.
It's possible to extend the Xperia Z5's capacity beyond that of the most spacious iPhone 6S with a single 128GB or 200GB card. What's more, these can be removed and replaced at will, giving the Sony smartphone theoretically limitless storage. Such is the oft-underestimated importance of a microSD slot.
Despite their makers' best efforts, the iPhone 6S and Xperia Z5 are fairly evenly matched. The sharper screen and higher resolution camera on the Sony smartphone are countered by the more portable design and intriguing 3D Touch capabilities of the iPhone 6S.
Perhaps greater differences will become apparent once we get a better idea of each device's true performance and battery capabilities.
A new RSA report urges coders to sign a 'Hippocratic Oath' before embarking on AI programmes.
IT security vendor believes APT33 is working for the Iranian government
Darktrace pushes machine learning to take some of the pressure off of IT and security teams
Google also gets its hands on HTC's IP in a non-exclusive deal