Asus Zenfone 9 vs Galaxy S21+ 5G

The Asus Zenfone 9, released in late 2022, and the Samsung Galaxy S21 Plus 5G, launched in early 2021, represent distinct approaches to the premium smartphone experience. While the Zenfone 9 emphasizes a compact form factor with powerful internals, the Galaxy S21 Plus 5G offers a larger display and a more expansive multimedia focus. Both devices run on the Android operating system, providing a familiar software environment, but they cater to different user preferences regarding size and feature sets.

When considering the long-term usability of these devices, their release timelines and software support policies are key factors. The Zenfone 9, being a newer device, generally benefits from a longer expected period of software updates compared to the S21 Plus 5G.

• Release Timeline: The Asus Zenfone 9 was released in September 2022, while the Samsung Galaxy S21 Plus 5G became available in January 2021. This difference in launch dates means the Zenfone 9 has a natural advantage in terms of remaining software support. [3, 6, 16, 21, 32]
• OS Support Duration: Samsung typically provides several years of Android OS updates and security patches for its flagship devices, with the S21 Plus 5G having received updates up to Android 13. Asus also offers multiple years of updates, and the Zenfone 9, starting with Android 12, is expected to receive subsequent Android versions, potentially extending its functional lifespan further into the future. [6, 16, 21, 32]
• Durability Features: Both smartphones feature an IP68 rating for dust and water resistance, indicating a similar level of protection against environmental elements. The displays on both devices are protected by Corning Gorilla Glass Victus, offering enhanced scratch and drop resistance. [8, 10, 18, 21, 28, 30]

Both the Asus Zenfone 9 and the Samsung Galaxy S21 Plus 5G deliver robust performance suitable for demanding applications and multitasking, though they achieve this with different underlying hardware and battery capacities.

• Processing Power: The Zenfone 9 is equipped with a more recent generation processor, which allows it to handle intensive tasks, graphic-heavy games, and complex applications with notable responsiveness and efficiency. [1, 4, 6, 9, 18] The Galaxy S21 Plus 5G, while featuring a powerful processor for its release year, still offers smooth performance for everyday use and most demanding applications, though it may exhibit more warmth under sustained heavy loads. [3, 24, 28, 31, 36]
• Battery Endurance: The Asus Zenfone 9, despite its smaller physical size, is noted for its impressive battery life, often lasting a full day and sometimes into a second day for average users. [1, 2, 7, 8, 11, 15, 23, 29] The Galaxy S21 Plus 5G, with its larger battery capacity, also provides excellent battery life, capable of lasting a full day of heavy use or up to two days with lighter usage. [13, 24, 25, 28, 33, 35]
• Memory and Storage: Both devices offer ample RAM for smooth multitasking, with the Zenfone 9 having configurations up to 16GB and the S21 Plus 5G typically featuring 8GB. Both come with internal storage options of 128GB or 256GB, providing sufficient space for apps, media, and files. Neither device supports expandable storage via a microSD card. [2, 3, 9, 18, 24, 25, 28, 33]

The visual experience on both smartphones is characterized by vibrant displays, though they differ in size and some specific attributes.

• Display Technology and Clarity: Both the Zenfone 9 and the Galaxy S21 Plus 5G feature AMOLED displays, known for their deep blacks and vibrant colors. The Zenfone 9 has a 5.9-inch Full HD+ display, resulting in a high pixel density that provides sharp and detailed images. [1, 4, 8, 10, 11, 18, 21] The Galaxy S21 Plus 5G offers a larger 6.7-inch Full HD+ Dynamic AMOLED 2X display, which also delivers excellent clarity and color reproduction, with the larger size providing a more expansive viewing area. [3, 24, 25, 28, 30, 31, 33, 35]
• Brightness and Refresh Rate: Both phones support a 120Hz refresh rate, contributing to smoother scrolling and more fluid animations. The Zenfone 9 can reach a peak brightness of 1100 nits, ensuring good visibility in various lighting conditions. [1, 8, 10, 18] The Galaxy S21 Plus 5G boasts a slightly higher peak brightness of 1300 nits, which can be beneficial for outdoor visibility. [28]
• Screen Design: The Zenfone 9 features a flat display, which some users prefer for ease of use and reduced accidental touches. [12] The Galaxy S21 Plus 5G also adopted a flat display design, moving away from the curved edges seen in some previous Samsung models. [14, 25, 33]

Both devices offer capable camera systems for capturing photos and videos, with distinct strengths and features tailored to different photographic needs.

• Rear Camera Systems: The Asus Zenfone 9 features a dual-camera setup with a 50MP main sensor that includes a 6-axis gimbal stabilization system, enhancing stability for both photos and videos, particularly in challenging conditions. It also has a 12MP ultrawide lens. [1, 2, 4, 5, 16] The Galaxy S21 Plus 5G comes with a versatile triple-camera system, including a 12MP wide-angle lens with optical image stabilization, a 12MP ultrawide lens, and a 64MP telephoto lens offering 3x hybrid zoom. [24, 25, 27, 30, 33, 35]
• Photography Performance: The Zenfone 9's main camera performs well in low-light conditions due to its sensor and gimbal stabilization, though some users have noted occasional inconsistencies in image processing and a lack of a dedicated telephoto lens. [1, 2, 5, 19, 20, 26] The S21 Plus 5G is known for producing vibrant photos with good dynamic range, and its telephoto lens provides flexibility for zoomed shots, though the digital zoom capabilities beyond 3x may result in reduced detail. [17, 25, 30, 37]
• Video Capabilities: Both phones are capable of recording high-resolution video, including 4K at 60fps, with the Zenfone 9's gimbal system providing particularly smooth footage. The S21 Plus 5G also offers strong video recording features, including 8K video capture, and its camera system is well-suited for content creation. [1, 5, 16, 17, 19, 24, 28]