Galaxy S23+ • Unlocked vs Galaxy S25 Ultra • Unlocked

The Samsung Galaxy S23 Plus, released in February 2023, and the Samsung Galaxy S25 Ultra, launched in February 2025, represent distinct offerings within Samsung's flagship smartphone portfolio. While both devices operate on the Android platform with Samsung's One UI, the S25 Ultra, as a newer and higher-tier model, introduces significant advancements in display technology, camera capabilities, and extended software support. These differences cater to varying user needs, from robust everyday functionality to cutting-edge performance and features.

The practical lifespan of a smartphone is significantly influenced by its release timeline and the duration of software support it receives.

• Software Longevity: The Galaxy S23 Plus, launched in early 2023, was initially promised four years of Android OS updates and five years of security updates, extending its viability until around 2028. In contrast, the Galaxy S25 Ultra, released in early 2025, benefits from Samsung's updated policy, guaranteeing seven years of Android OS upgrades and seven years of security updates, ensuring it remains current with the latest features and security patches through 2032.
• Build Durability: Both devices feature robust construction. The S23 Plus uses Gorilla Glass Victus 2 on the front and back, coupled with an Armor Aluminum frame. The S25 Ultra elevates this with Corning Gorilla Armor 2 on the front, which offers enhanced scratch resistance and anti-reflective properties, and is designed to withstand drops from greater heights, along with a titanium frame. Both carry an IP68 rating for dust and water resistance.
• Repairability: Information regarding the S23 Plus's repairability score is less prominent, but generally, older Samsung flagships had lower scores. The Galaxy S25 Ultra has shown improvements in repairability, earning a provisional iFixit score of 5 out of 10, particularly due to easier battery access and a modular camera setup, though it still relies on adhesive for some components.

Performance is a key differentiator, with the newer Galaxy S25 Ultra offering a more advanced processing package compared to the S23 Plus.

• Processing Power: The Galaxy S23 Plus is equipped with a powerful processor from its generation, providing smooth operation for daily tasks, multitasking, and demanding applications. The Galaxy S25 Ultra features a newer, more efficient processor designed for enhanced speed and responsiveness, particularly noticeable in intensive gaming, advanced AI features, and heavy multitasking scenarios.
• Multitasking and Storage: The S23 Plus typically comes with 8GB of RAM and storage options up to 512GB. The S25 Ultra offers more expansive storage options, including 256GB, 512GB, and 1TB, and typically comes with 12GB or 16GB of RAM, contributing to a more seamless experience when running multiple applications simultaneously or engaging in graphically intensive activities.
• Battery Behavior: The S23 Plus houses a 4700 mAh battery, which users generally report as providing good endurance for a full day of moderate to heavy use. The S25 Ultra features a larger 5000 mAh battery, and user feedback suggests it can comfortably last for a day and a half under typical usage conditions, though some users have reported disappointing battery life and overheating issues.

The visual experience on both devices is premium, though the S25 Ultra offers advancements in display technology.

• Display Technology and Size: The Galaxy S23 Plus features a 6.6-inch Dynamic AMOLED 2X display with a Full HD+ resolution (2340x1080 pixels), providing clear and vibrant visuals for everyday content consumption. The Galaxy S25 Ultra boasts a larger 6.9-inch Dynamic LTPO AMOLED 2X display with a Quad HD+ resolution (3120x1440 pixels), resulting in a sharper and more detailed image, especially noticeable with high-resolution media.
• Brightness and Clarity: Both phones offer excellent outdoor visibility. The S23 Plus reaches a peak brightness of 1750 nits. The S25 Ultra offers a higher peak brightness of up to 2600 nits, enhancing outdoor visibility and HDR content viewing. The S25 Ultra also benefits from an anti-reflective coating on its display, further improving outdoor usability.
• Refresh Rate and Smoothness: Both devices feature a 120Hz adaptive refresh rate for smooth scrolling and responsiveness, adjusting dynamically to content to optimize power consumption.

The camera systems on both devices are capable, but the S25 Ultra, as an Ultra model, provides a more versatile and advanced photography and videography experience.

• Rear Camera System: The Galaxy S23 Plus features a triple camera setup with a 50MP main sensor, a 12MP ultrawide, and a 10MP telephoto lens offering 3x optical zoom. The Galaxy S25 Ultra elevates this with a quad-camera system, including a 200MP main sensor, a 50MP ultrawide, a 10MP telephoto with 3x optical zoom, and an additional 50MP telephoto lens capable of 5x optical zoom and up to 100x digital zoom.
• Photography Performance: While the S23 Plus delivers good quality photos in various conditions, some users have noted inconsistencies, struggles in poor lighting, and issues with over-sharpening or slow shutter speed. The S25 Ultra generally offers sharper details, better dynamic range, and improved low-light performance, especially when utilizing its advanced zoom capabilities.
• Video Recording: Both devices are capable of 8K video recording. The S25 Ultra delivers more consistent colors and dynamic range in videos, and also introduces features like LOG video capture for more flexible post-production editing.