Here is a comparison of the key differences between the iPhone 17 and the iPhone 16:

Display:

• The iPhone 17 has a larger 6.3-inch Super Retina XDR OLED display with a resolution of 2622 x 1206 pixels and a dynamic refresh rate of up to 120Hz (ProMotion technology). It also supports always-on display, True Tone, HDR, and has a peak brightness of 3000 nits.
• The iPhone 16 has a 6.1-inch Super Retina XDR OLED display with a resolution of 2556 x 1179 pixels and a fixed refresh rate of 60Hz. Peak brightness is 2000 nits and it does not support always-on display.
• The iPhone 17 display introduces an anti-reflective coating absent on the iPhone 16.

Performance:

• The iPhone 17 is powered by the A19 chip with a 16-core Neural Engine and improved memory bandwidth but still 8GB RAM.
• The iPhone 16 uses the A18 chip with a 16-core Neural Engine and 8GB RAM.
• The iPhone 17 features Apple’s new display engine enabling ProMotion and always-on display.

Cameras:

• The iPhone 17 upgrades the ultra-wide camera from 12MP on the iPhone 16 to 48MP with a wider aperture and 120-degree field of view.
• The front camera is upgraded from 12MP on iPhone 16 to 18MP on iPhone 17 with Center Stage, stabilization for video, and dual capture mode.
• Both have a 48MP wide camera and similar video recording capabilities.

Battery and Charging:

• The iPhone 17 offers longer battery life with up to 30 hours of video playback vs 22 hours on iPhone 16.
• The iPhone 17 supports faster charging, reaching 50% in 20 minutes with a 40W adapter compared to 30 minutes on iPhone 16.

Connectivity:

• iPhone 17 has an Apple-designed Wi-Fi chip (N1) with better AirDrop and hotspot performance and supports Bluetooth 6 vs Bluetooth 5.3 on iPhone 16.
• Both support 5G sub-6GHz and mmWave.

Other:

• The iPhone 17 features more subdued color options and uses Ceramic Shield 2 for improved durability over the iPhone 16’s Ceramic Shield.
• The iPhone 17 starts at 256GB base storage, double the 128GB base on the iPhone 16.

Summary: The iPhone 17 offers a larger, brighter, and more advanced display, notably with ProMotion and always-on features, better ultra-wide and front cameras with advanced features, longer battery life, improved charging speeds, and upgraded connectivity. The performance is incrementally improved with the new A19 chip and Neural Engine enhancements. Storage also starts higher on the iPhone 17.

This makes the iPhone 17 a significant upgrade in display, camera, battery, and connectivity, while maintaining similar core performance specs compared to the iPhone 16.