New Pro or last year's Max

The iPhone 17 Pro Max is the better buy for most people choosing between these two. At £1,023.38 for 256GB on Amazon UK at the time of writing (September 2026), the iPhone 17 Pro Max costs £175.62 less than the iPhone 18 Pro at £1,199, and it gives you a bigger 6.9 inch screen, a bigger battery and longer rated video playback. The iPhone 18 Pro wins on chip speed, charging speed, its variable-aperture main camera and one-handed comfort. Pay the extra only if those four things matter more to you than screen size and endurance.

What does the extra £175.62 buy you?

The extra £175.62 buys a newer chip, faster wired charging, a more flexible main camera and a lighter phone, but it also costs you 0.6 inches of screen and 776 mAh of battery. Compare Electronic built the line-by-line breakdown below from Apple's UK spec sheets for the nano-SIM models sold here, set against Amazon UK prices for the 256GB versions.

Compare Electronic's read:£175.62 spread across seven gains works out at roughly £25 per upgrade, but only two of them, the chip and the charging, change daily use in a way most owners will notice. The iPhone 17 Pro Max's A19 Pro is still one of the fastest phone chips on sale, so the chip gain is headroom for the next five years of iOS rather than something felt on day one.

Is the iPhone 18 Pro better than the iPhone 17 Pro Max?

The iPhone 18 Pro is the more advanced phone, but the iPhone 17 Pro Max is the more capable one for screen-heavy use. The iPhone 18 Pro runs the A20 Pro, Apple's first iPhone chip on a 2 nm process, with a 6-core CPU, a 7-core GPU and a dual 16-core Neural Engine. The iPhone 17 Pro Max runs the A19 Pro on 3 nm with a 6-core CPU and a 6-core GPU. Apple says the A20 Pro's GPU is up to 40 percent faster than the A19 Pro's, and that its memory bandwidth is 50 percent higher.

Both phones carry 12 GB of RAM, a 120 Hz ProMotion OLED display and the same brightness figures: 1,600 nits peak for HDR and 3,000 nits peak outdoors. The difference is size. The iPhone 17 Pro Max has a 6.9 inch, 2868 x 1320 panel; the iPhone 18 Pro has a 6.3 inch, 2622 x 1206 panel at the same 460 pixels per inch. Text looks equally sharp on both, there is simply more of it on the Max.

Two iPhone 18 Pro upgrades are easy to overlook. The first is the modem: UK iPhone 18 Pro models use Apple's own C2 modem, which Apple says uses 15 percent less energy than its C1X, while teardowns show the iPhone 17 Pro Max uses Qualcomm's Snapdragon X80. The second is cooling. Apple says the iPhone 18 Pro's vapour chamber has three times the surface area of the iPhone 17 Pro's and lifts sustained performance by up to 40 percent, which matters for long gaming sessions and 4K video recording.

Both phones run iOS 27, which arrived as a free update on 14 September 2026. Apple typically supports an iPhone with major iOS updates for five years or more, so the iPhone 18 Pro buys roughly one extra year of software runway over the iPhone 17 Pro Max.

Which has the better battery life?

The iPhone 17 Pro Max has the better battery life. Apple rates the UK iPhone 17 Pro Max at 37 hours of video playback and 33 hours of streamed video. Apple rates the UK iPhone 18 Pro at 34 hours of video playback and 31 hours streamed. The iPhone 17 Pro Max carries a 4,832 mAh battery in its nano-SIM version, against 4,056 mAh in the nano-SIM iPhone 18 Pro.

Independent testing points the same way. Tom's Guide's web-browsing test, run over cellular at 150 nits, recorded 17 hours 54 minutes for the iPhone 17 Pro Max and 16 hours 17 minutes for the iPhone 18 Pro. That 1 hour 37 minute gap is smaller than the 776 mAh capacity difference suggests, which is the A20 Pro's efficiency and the C2 modem doing their job, but the bigger phone still wins.

UK buyers should note one detail in Apple's marketing. The 36 hour video figure Apple quotes for the iPhone 18 Pro applies to eSIM-only models sold in the US and a handful of other markets. UK models keep a nano-SIM tray, a smaller battery and the 34 hour rating. Charging speed partly closes the gap: the iPhone 18 Pro reaches 50 percent in around 15 minutes with a 60 W-capable adapter, while the iPhone 17 Pro Max needs around 20 minutes with a 40 W adapter. For more phones ranked on endurance, see the longest battery life smartphones of 2026.

Which has the better camera?

The iPhone 18 Pro has the slightly better camera, and the only hardware difference is the main lens. The iPhone 18 Pro's 48 MP Fusion Main camera has a variable aperture that runs from f/1.48 to f/4 using six blades, while the iPhone 17 Pro Max's 48 MP main camera has a fixed aperture. A narrower aperture keeps more of a scene in focus, which helps group shots, close-ups and landscapes with a foreground subject. The wider f/1.48 setting gathers more light than the iPhone 17 Pro Max's fixed lens in dim rooms.

Everything else matches. Both phones pair the main camera with a 48 MP ultra wide and a 48 MP telephoto at 100 mm (4x), both offer an 8x optical-quality crop at 200 mm, and both have a 16x optical-quality zoom range and an 18 MP Center Stage front camera. Anyone buying for zoom reach gains nothing by paying for the iPhone 18 Pro.

Apple iPhone 18 Pro - the newer, faster, smaller choice

The iPhone 18 Pro costs £1,199 for 256GB on Amazon UK at the time of writing (September 2026), the same as Apple's UK launch price. It comes in black, silver, glacier and burgundy, with an aluminium unibody, a Ceramic Shield 2 front and a smaller Dynamic Island that can show three Live Activities at once. The iPhone 18 Pro weighs 211 g, 20 g less than the iPhone 17 Pro Max, and measures 71.9 mm wide against 78.0 mm.

The iPhone 18 Pro suits buyers who find a 6.9 inch phone too big, who record long 4K clips or play demanding games where the new cooling helps, and who plan to keep the phone for five years or more. Buyers who want the same A20 Pro with a bigger screen and battery should look at the iPhone 18 Pro vs iPhone 18 Pro Max comparison instead.

Apple iPhone 17 Pro Max - the bigger phone for less

The iPhone 17 Pro Max costs £1,023.38 for 256GB on Amazon UK at the time of writing (September 2026), £175.62 below its £1,199 launch price and £175.62 below the iPhone 18 Pro. Last-generation prices can move quickly once the new models arrive. The iPhone 17 Pro Max comes in silver, cosmic orange and deep blue.

The iPhone 17 Pro Max suits buyers who watch a lot of video, read or edit on their phone, want the longest battery life Apple sold in 2025, and would rather put £175 towards a case, AppleCare or a MagSafe charger than a newer chip.

iPhone 18 Pro vs iPhone 17 Pro Max: full spec sheet

The iPhone 18 Pro and iPhone 17 Pro Max share their camera hardware, RAM and display technology, and differ on chip, size, battery and charging. Figures below are Apple's for UK nano-SIM models.

Which storage tier is the best value?

The 2TB iPhone 17 Pro Max is the cheapest storage per gigabyte of any configuration here, at 93p per GB, and the 256GB iPhone 18 Pro is the most expensive, at £4.68 per GB. Compare Electronic divided each Amazon UK price at the time of writing (September 2026) by the storage capacity to build the table below.

The gap widens as storage grows. At 256GB the iPhone 17 Pro Max saves £175.62; at 1TB it saves £300; at 2TB it saves £500. One comparison stands out: the 512GB iPhone 17 Pro Max costs £1,299, just £100 more than the 256GB iPhone 18 Pro, for double the storage and the bigger screen. Buyers who shoot ProRes or ProRAW fill 256GB quickly, and for them the 512GB iPhone 17 Pro Max is the standout deal in this comparison.

Who should skip each phone?

Owners of an iPhone 17 Pro or iPhone 17 Pro Max should skip both, because the camera hardware, RAM and display brightness are unchanged and the A19 Pro has years of headroom left.

• Skip the iPhone 18 Pro if battery life is your first priority, if you mostly watch video or read on your phone, or if you need 1TB or more, where the iPhone 17 Pro Max saves £300 to £500.
• Skip the iPhone 17 Pro Max if you have smaller hands or carry your phone in a jeans pocket, since it is 6.1 mm wider, 13.4 mm taller and 20 g heavier than the iPhone 18 Pro, or if you want the longest possible software support.
• Skip both if you want the biggest battery Apple sells: the iPhone 18 Pro Max is rated at 43 hours of video playback in the UK and costs £1,299 for 256GB on Amazon UK at the time of writing (September 2026).

What should UK buyers know before ordering?

Neither phone includes a charger in the UK box. The iPhone 18 Pro and iPhone 17 Pro Max both ship with a 1 metre USB-C cable only, so buyers need a UK 3-pin USB-C adapter: 60 W or higher to hit the iPhone 18 Pro's 15 minute half-charge, 40 W or higher for the iPhone 17 Pro Max's 20 minute figure.

Apple includes a one-year limited warranty with both phones. The Consumer Rights Act 2015 gives UK buyers 30 days to reject a faulty phone for a full refund, and online orders carry a 14-day cancellation window under the Consumer Contracts Regulations. Both UK models take a nano-SIM and eSIM, so a physical SIM from a UK network works in either phone. For the wider line-up, including older models, see our iPhone comparison and the best phones in the UK this autumn.

Verdict: iPhone 18 Pro or iPhone 17 Pro Max?

The iPhone 17 Pro Max is the better buy for most UK buyers in September 2026. At £1,023.38 for 256GB on Amazon UK, the iPhone 17 Pro Max delivers a 6.9 inch screen, a 4,832 mAh battery, 37 hours of rated video playback and the same 48 MP triple camera for £175.62 less than the iPhone 18 Pro, and its value lead grows to £500 at 2TB.

The iPhone 18 Pro is the right choice for buyers who want a smaller, lighter phone at 211 g, faster charging at 50 percent in around 15 minutes, the variable-aperture main camera and the A20 Pro's extra year of software runway. Both are strong phones; the decision comes down to whether £175.62 is worth more to you than 0.6 inches of screen and three hours of battery.