iPhone 15 Pro vs iPhone 6S
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iPhone 15 Pro
Starting at
£542.00£1,099.00 new
iPhone 6S
Starting at
£32.09£149.00 newWhat's the difference between the iPhone 15 Pro and iPhone 6S?
iPhone 15 Pro vs 6S comes down to the chipset, RAM and battery. Refurbished, the iPhone 6S starts at £32.09, £509.91 less than the iPhone 15 Pro. The iPhone 15 Pro is the newer model, released in 2023.
Refurbished from
Chipset
RAM
Battery
Screen size
Screen type
- Chipset: Apple A17 Pro on the iPhone 15 Pro, Apple A9 APL0898 on the iPhone 6S.
- The iPhone 15 Pro has more RAM: 8 GB vs 2 GB.
- The iPhone 15 Pro has a bigger battery: 3274 mAh vs 1715 mAh.
iPhone 15 Pro vs iPhone 6S specs
The iPhone 15 Pro and iPhone 6S differ significantly in performance, screen quality, and features, suiting different types of users. The iPhone 15 Pro has a larger, higher resolution OLED screen and more RAM, making it suitable for users who want a smoother experience with demanding apps and sharper visuals. The iPhone 6S offers a smaller screen and simpler performance with fewer storage options, fitting those who prefer a compact device for everyday use or want a more straightforward phone at a lower price. Both devices are unlocked and offer good cameras for their time, but the 15 Pro provides higher megapixel counts front and back, ideal for more detailed photos.
iPhone 15 Pro vs iPhone 6S price
Colour
iPhone 15 Pro vs iPhone 6S battery life and software updates
These factors affect how long the device can be used between charges and how current the software remains.
Battery Capacity
The iPhone 15 Pro has a 3274 mAh battery, nearly twice the size of the iPhone 6S's 1715 mAh. This means the 15 Pro can generally support longer usage between charges, which benefits users who rely heavily on their phone throughout the day. The iPhone 6S is better suited to those with lighter daily usage or who charge more frequently.
Software Updates
Users who prioritise up-to-date software will prefer the 15 Pro, while those happy with a stable, older system may find the 6S sufficient.
Operating System
Both devices use iOS, providing a familiar and consistent interface. This suits users who want the Apple ecosystem experience regardless of which phone they choose.
Battery
Foldable
Ip rating
Software updates
Wireless charging
Year of release
iPhone 15 Pro vs iPhone 6S performance
Performance depends on chipset, RAM, and storage options. These influence how smoothly apps run, multitasking ability, and how much space is available for files and apps.
Chipset Power
The iPhone 15 Pro features the Apple A17 Pro chipset, which is more advanced than the Apple A9 APL0898 in the iPhone 6S. This makes the 15 Pro better suited for demanding apps, gaming, and multitasking. The iPhone 6S is a simpler choice for everyday tasks like calls, messaging, and basic apps.
RAM Capacity
With 8 GB of RAM, the iPhone 15 Pro keeps more apps open at once and handles multitasking smoothly. The iPhone 6S has 2 GB of RAM, which works well for basic use but is best for users who run fewer apps simultaneously.
Storage Options
The iPhone 15 Pro comes in 128GB, 256GB, 512GB, and 1TB sizes, offering plenty of space for apps, photos, and videos. The iPhone 6S offers 16GB, 32GB, and 64GB models, suitable for lighter users or those who manage storage carefully.
Chipset
RAM
iPhone 15 Pro vs iPhone 6S screen
Screen quality affects how clear and vibrant images appear. Differences in resolution, size, and screen type influence viewing comfort and detail.
Screen Size
The iPhone 15 Pro has a 6.1 inch screen, providing more room for video, browsing, and reading. The iPhone 6S has a smaller 4.7 inch screen, which suits users who prefer a compact device that fits easily in one hand.
Resolution
With a resolution of 1179 by 2556 pixels, the iPhone 15 Pro offers sharper and more detailed images. The iPhone 6S has 750 by 1334 pixels, enough for everyday use but less crisp for high-definition content.
Screen Type
The iPhone 15 Pro uses an LTPO Super Retina XDR OLED screen, which delivers deeper blacks, higher contrast, and better power efficiency. The iPhone 6S uses an IPS LCD screen, known for accurate colours and good viewing angles, fitting users who want a clear display without advanced OLED features.
Refresh rate
Resolution
Screen size
Screen type
iPhone 15 Pro vs iPhone 6S camera
Audiovisual features include camera quality, which impacts photo and video detail, important for users who capture moments often.
Front Camera
The iPhone 15 Pro has a 12 megapixel front camera, offering higher detail for selfies and video calls. The iPhone 6S features a 5 megapixel front camera, suitable for simpler self-portraits and video chats.
Main Camera
With a 48 megapixel main camera, the iPhone 15 Pro captures more detailed and sharper photos, ideal for photography enthusiasts or anyone wanting high-quality images. The iPhone 6S's 12 megapixel main camera works well for general photography and everyday snapshots.
Camera type
Front camera
Main camera
iPhone 15 Pro vs iPhone 6S size and design
Other features like connectivity, size, and physical design affect usability and convenience in daily life.
Network Compatibility
The iPhone 15 Pro supports 5G networks, allowing faster mobile internet where 5G is available. The iPhone 6S supports 4G, which still provides reliable internet speeds for most users but not the latest connectivity.
SIM Technology
The iPhone 15 Pro uses eSIM technology, which allows digital SIM management without a physical card. The iPhone 6S uses a physical SIM card, which some users find straightforward and easy to swap between devices.
Connector Type
The iPhone 6S has a Lightning connector plus a 3.5mm headphone jack, useful for those who prefer wired headphones without an adapter.
Physical Size and Weight
The iPhone 15 Pro measures 146.6 mm in height, 70.6 mm in width, and 8.3 mm in depth, weighing 171 g. The iPhone 6S is slightly taller at 138.3 mm, narrower at 67.1 mm, and 7.1 mm deep, weighing 143 g. The 6S suits users wanting a lighter, more compact phone, while the 15 Pro offers a larger screen in a still manageable size.
Carrier compatibility
Connector
Depth
Height
Mobile network
Release date
SD card slot
SIM card
Weight
Width
iPhone 15 Pro or iPhone 6S: which should you buy?
Buy the iPhone 15 Pro if
- you want more RAM (8 GB vs 2 GB)
- you want a bigger battery (3274 mAh vs 1715 mAh)
- you want a bigger screen (6.1 inch vs 4.7 inch)
Buy the iPhone 6S if
- you want to spend less: it starts at £32.09, £509.91 less than the iPhone 15 Pro
- you want a lighter build (143 g vs 187 g)
- you want a headphone jack
What our customers say
Customers who chose the iPhone 15 Pro appreciate its near-new condition and strong battery health, with many noting smooth performance and excellent camera quality. Several mention the phone looks like new, sometimes with only minor scratches, and praise its speed and screen clarity. Users highlight the environmental benefit of buying refurbished and enjoy the device as a significant upgrade for photography and everyday use.
The iPhone 6S receives praise for its excellent condition and value for money. Customers find it suitable for simple use, noting that it feels light and compact. Many say it works well for everyday needs and appreciate the straightforward design. Battery health can vary, but users who get a good unit report lasting all day and being happy with the phone's performance for basic tasks.
The iPhone 15 Pro suits users needing a powerful, feature-rich phone for apps, photography, and media. The iPhone 6S fits those looking for a smaller, simpler, and more affordable device for everyday communication and light use.
iPhone 15 Pro vs iPhone 6S FAQs
iPhone 15 Pro vs 6S comes down to the chipset, RAM and battery. Chipset: Apple A17 Pro on the iPhone 15 Pro, Apple A9 APL0898 on the iPhone 6S. The iPhone 15 Pro has more RAM: 8 GB vs 2 GB.
The iPhone 6S is cheaper refurbished, from £32.09 compared with £542 for the iPhone 15 Pro.
The iPhone 15 Pro has a bigger battery: 3274 mAh vs 1715 mAh.
The iPhone 15 Pro has a higher-resolution main camera: 48 megapixels vs 12 megapixels.
The iPhone 15 Pro is still supported and can run iOS 27. Updates for the iPhone 6S ended in Mar 2025. Its last version is iOS 15.
The iPhone 15 Pro adds more RAM (8 GB vs 2 GB), a bigger battery (3274 mAh vs 1715 mAh) and a bigger screen (6.1 inch vs 4.7 inch). Refurbished, it costs £509.91 more (from £542 vs £32.09).
Refurbished, the iPhone 15 Pro comes in 128GB, 256GB, 512GB and 1TB, and the iPhone 6S in 16GB, 32GB and 64GB.
