iPhone 15 vs iPhone 6S
Shop iPhone
iPhone 15
Starting at
£416.19£699.00 new
iPhone 6S
Starting at
£32.09£149.00 newWhat's the difference between the iPhone 15 and iPhone 6S?
iPhone 15 vs 6S comes down to the chipset, RAM and battery. Refurbished, the iPhone 6S starts at £32.09, £384.10 less than the iPhone 15. The iPhone 15 is the newer model, released in 2023.
Refurbished from
Chipset
RAM
Battery
Screen size
Screen type
- Chipset: Apple A16 Bionic on the iPhone 15, Apple A9 APL0898 on the iPhone 6S.
- The iPhone 15 has more RAM: 6 GB vs 2 GB.
- The iPhone 15 has a bigger battery: 3349 mAh vs 1715 mAh.
iPhone 15 vs iPhone 6S specs
The iPhone 15 and iPhone 6S cater to different needs and preferences. The iPhone 15 offers a larger, higher-resolution OLED screen, a more powerful chipset, more RAM, and bigger cameras for sharper photos. Its battery capacity is nearly double, supporting longer use between charges. The iPhone 6S is smaller with a compact screen and fewer features, making it suitable for everyday use or those who prefer a smaller phone. It includes a 3.5mm headphone jack and uses the Lightning connector. Storage options differ, with the iPhone 15 starting at 128GB and the 6S at 16GB. Choose the iPhone 15 for more power and screen space, or the iPhone 6S for a simpler, smaller device.
iPhone 15 vs iPhone 6S price
Colour
iPhone 15 vs iPhone 6S battery life and software updates
Durability covers battery size, software support, and device build details. These factors affect how long each phone lasts on a charge and how long it stays up to date with software.
Battery Capacity
The iPhone 15 has a battery capacity of 3349 mAh, almost twice the 1715 mAh of the iPhone 6S. This means the iPhone 15 can generally run longer between charges, suiting users who need extended use without recharging. The iPhone 6S is better suited for those who use their phone less intensively or prefer a smaller device.
Battery
Foldable
Ip rating
Software updates
Wireless charging
Year of release
iPhone 15 vs iPhone 6S performance
Performance covers the chipset, RAM, and storage options. These affect speed, multitasking ability, and how much data you can keep on the device.
Chipset and RAM
The iPhone 15 is powered by the Apple A16 Bionic chipset and has 6 GB of RAM, providing smooth multitasking and faster processing for demanding apps. The iPhone 6S has an Apple A9 chipset with 2 GB of RAM, suitable for everyday use and simpler tasks. If you run many apps at once or use demanding software, the iPhone 15 will handle this better.
Storage Options
Storage for the iPhone 15 starts at 128GB and goes up to 512GB, offering plenty of space for apps, photos, and files. The iPhone 6S comes with smaller storage options of 16GB, 32GB, and 64GB, which work for basic use but may fill up quickly with larger apps or media collections.
Chipset
RAM
iPhone 15 vs iPhone 6S screen
Screen quality impacts how content looks and how comfortable the phone is for viewing. Differences include size, resolution, and screen technology.
Screen Size and Resolution
The iPhone 15 has a 6.1 inch screen with a resolution of 1179 x 2556, offering a larger and sharper display for watching videos or reading. The iPhone 6S has a 4.7 inch screen at 750 x 1334 resolution, which is smaller and less sharp but easier to hold with one hand. Choose the iPhone 15 for more screen space or the iPhone 6S for a compact display.
Screen Technology
The iPhone 15 uses a Super Retina XDR OLED screen, which typically provides better contrast and deeper blacks. The iPhone 6S has an IPS LCD screen, which offers consistent colour and brightness but with less contrast. Users who value vibrant and dynamic visuals will prefer the iPhone 15 screen.
Refresh rate
Resolution
Screen size
Screen type
iPhone 15 vs iPhone 6S camera
Audiovisual covers cameras and image capture capabilities. These specs affect photo and video quality for selfies and main shots.
Front Camera
The iPhone 15 has a 12 megapixel front camera, which captures more detail in selfies compared to the 5 megapixel front camera on the iPhone 6S. This suits users who often take self-portraits or video calls.
Main Camera
The main camera on the iPhone 15 is 48 megapixels, allowing for higher detail and sharper photos than the 12 megapixel camera on the iPhone 6S. Photographers and users who take many photos may prefer the iPhone 15 for this reason.
Camera type
Front camera
Main camera
iPhone 15 vs iPhone 6S size and design
Miscellaneous specs include connectivity, network support, physical dimensions, and ports. These affect everyday use and compatibility with accessories.
Network and SIM
The iPhone 15 supports 5G networks and offers both a physical SIM and eSIM option, which allows for flexible mobile plans. The iPhone 6S supports 4G and has a physical SIM only. Users wanting faster mobile data and dual SIM options will find the iPhone 15 better suited.
Connector and Headphone Jack
The iPhone 15 uses a USB-C connector, which is common for many devices today. The iPhone 6S features a Lightning connector and includes a 3.5mm headphone jack for wired headphones. Those who prefer using traditional wired headphones without adapters may prefer the iPhone 6S.
Size and Weight
The iPhone 15 measures 147.6 mm tall, 71.6 mm wide, and 7.8 mm deep, weighing 171 g. The iPhone 6S is smaller at 138.3 mm tall, 67.1 mm wide, and 7.1 mm deep, weighing 143 g. If you prefer a lighter, smaller phone, the iPhone 6S fits better in one hand or pocket.
Carrier compatibility
Connector
Depth
Height
Mobile network
Release date
SD card slot
SIM card
Weight
Width
iPhone 15 or iPhone 6S: which should you buy?
Buy the iPhone 15 if
- you want more RAM (6 GB vs 2 GB)
- you want a bigger battery (3349 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, £384.10 less than the iPhone 15
- you want a lighter build (143 g vs 171 g)
- you want a headphone jack
What our customers say
Customers who chose the iPhone 15 often mention that the phone looks like new, even in fair condition, and praise its long battery life and reliable performance. Many users find the screen clear and responsive, and the camera quality meets their expectations. Several customers highlight the high battery health and smooth setup process. The iPhone 15 suits those who want a device with strong performance, a large screen, and up-to-date software.
The iPhone 6S appeals to users seeking a simple, good quality smartphone at a lower price, often noting its excellent condition and light weight. Many customers say it feels like a brand new phone and suits everyday use well. Some mention the battery health can vary, but a good condition model lasts all day. The smaller size and familiar design are appreciated, making it suitable for those who want a compact phone without many features.
Overall, the iPhone 15 fits buyers looking for a powerful, modern phone with a larger screen and upgraded features, while the iPhone 6S suits people wanting a straightforward, smaller device for everyday use.
iPhone 15 vs iPhone 6S FAQs
iPhone 15 vs 6S comes down to the chipset, RAM and battery. Chipset: Apple A16 Bionic on the iPhone 15, Apple A9 APL0898 on the iPhone 6S. The iPhone 15 has more RAM: 6 GB vs 2 GB.
The iPhone 6S is cheaper refurbished, from £32.09 compared with £416.19 for the iPhone 15.
The iPhone 15 has a bigger battery: 3349 mAh vs 1715 mAh.
The iPhone 15 has a higher-resolution main camera: 48 megapixels vs 12 megapixels.
The iPhone 15 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 adds more RAM (6 GB vs 2 GB), a bigger battery (3349 mAh vs 1715 mAh) and a bigger screen (6.1 inch vs 4.7 inch). Refurbished, it costs £384.10 more (from £416.19 vs £32.09).
Refurbished, the iPhone 15 comes in 128GB, 256GB and 512GB, and the iPhone 6S in 16GB, 32GB and 64GB.
