Galaxy S21 Ultra 5G Vs Google Pixel 9 Pro XL

The Samsung Galaxy S21 Ultra 5G, released in January 2021, and the Google Pixel 9 Pro XL, launched in August 2024, represent different generations of flagship smartphones. While both devices offer premium experiences, the Pixel 9 Pro XL introduces more recent advancements in processing power, camera technology, and software longevity. This comparison will explore the practical differences between these two devices, helping users understand which model aligns best with their priorities, especially when considering a quality-assured refurbished option.

The lifespan of a smartphone is influenced by its release date, software support, and physical durability. These two devices, separated by over three years, offer distinct timelines for ongoing support and expected practical usage.

• Release Timeline: The Galaxy S21 Ultra 5G was released in January 2021. It launched with Android 11 and received its final major Android OS update, Android 15 (One UI 7.0), in the first half of 2025. Software support for the S21 series officially ended in February 2026. In contrast, the Google Pixel 9 Pro XL was released in August 2024, launching with Android 15.
• Software Longevity: The Galaxy S21 Ultra 5G received four major Android updates and five years of security patches, fulfilling Samsung's commitment at the time. The Pixel 9 Pro XL, however, benefits from Google's extended support policy, promising seven years of OS updates, which means it will continue to receive updates significantly longer than the S21 Ultra 5G.
• Repairability and Durability: The Galaxy S21 Ultra 5G received a low repairability score of 3 out of 10 from iFixit, primarily due to the extensive use of glue for components like the battery and display, making disassembly challenging. The Pixel 9 Pro XL features a durable glass back and a polished aluminum frame. While some sources still mention numerous screws and adhesive, it reportedly incorporates a dual-entry design for easier screen and battery replacement, and its USB-C port is on a separate daughterboard, potentially simplifying repairs.

Performance is a key differentiator, with the newer Pixel 9 Pro XL benefiting from more advanced internal components compared to the Galaxy S21 Ultra 5G.

• Processing Power: The Galaxy S21 Ultra 5G is powered by a processor from early 2021, which capably handles everyday applications and multitasking. The Pixel 9 Pro XL features a more recent processor, designed to offer enhanced performance for demanding applications, advanced AI features, and smoother overall system responsiveness.
• Multitasking and Storage: Both devices offer ample RAM, with the Galaxy S21 Ultra 5G available with 12GB or 16GB, and the Pixel 9 Pro XL typically featuring 16GB. This allows for efficient multitasking across numerous applications. Storage options are generous on both, ranging from 128GB to 512GB for the S21 Ultra 5G and up to 1TB for the Pixel 9 Pro XL, providing significant space for media and applications.
• Battery Performance: The Galaxy S21 Ultra 5G is equipped with a 5000 mAh battery, which generally provides a full day of use for most users. The Pixel 9 Pro XL features a 5060 mAh battery. User reports indicate exceptional battery longevity for the Pixel 9 Pro XL, with some tests showing nearly 19 hours of continuous use, suggesting strong power efficiency.

Both smartphones offer large, high-quality displays, but the newer Pixel 9 Pro XL incorporates advancements in brightness and display technology.

• Display Technology and Resolution: The Galaxy S21 Ultra 5G features a 6.8-inch Dynamic AMOLED 2X display with a resolution of 1440 x 3200 pixels, providing sharp images and vibrant colors. The Pixel 9 Pro XL also has a 6.8-inch OLED display, offering a resolution of 2992 x 1344 pixels, which delivers clear visuals and deep blacks.
• Brightness and Refresh Rate: The S21 Ultra 5G's display can reach a peak brightness of 1500 nits, ensuring good visibility in various lighting conditions. It also features an adaptive 120Hz refresh rate for smooth scrolling and responsiveness. The Pixel 9 Pro XL boasts a higher peak brightness of 3000 nits, which significantly enhances outdoor visibility and HDR content viewing. It also offers an adaptive refresh rate ranging from 1Hz to 120Hz, contributing to both smoothness and power efficiency.
• Viewing Experience: Both devices provide an immersive viewing experience due to their large screen sizes and high resolutions. The Pixel 9 Pro XL's higher peak brightness and potentially more advanced OLED panel may offer a slightly more impactful visual experience, particularly for HDR content and in bright environments.

Camera capabilities are a strong point for both devices, though the Pixel 9 Pro XL benefits from newer sensor technology and Google's computational photography advancements.

• Rear Camera Systems: The Galaxy S21 Ultra 5G features a versatile quad-camera setup, including a 108MP main sensor, a 12MP ultrawide, a 10MP telephoto with 3x optical zoom, and another 10MP periscope telephoto with 10x optical zoom. The Pixel 9 Pro XL comes with a triple-camera system, typically comprising a 50MP main sensor, a 48MP ultrawide, and a 48MP telephoto lens offering 5x optical zoom.
• Photography Performance: The S21 Ultra 5G is known for its detailed images and impressive zoom capabilities, particularly with its dual telephoto lenses. The Pixel 9 Pro XL leverages Google's advanced computational photography, which enhances image quality across various conditions, including low light, and provides consistent results. The Pixel's camera system is often praised for its natural color reproduction and dynamic range.
• Video and Front Camera: The Galaxy S21 Ultra 5G supports 8K video recording and features a 40MP front camera. The Pixel 9 Pro XL offers a 42MP front camera, which is well-suited for high-quality selfies and video calls, and is expected to deliver strong video recording capabilities with enhanced stabilization and AI features.