Samsung S21 Ultra vs S25 Ultra – Check Which One Is Best & Why?

Why Do I Recommend The Samsung Galaxy S25 Ultra? 

• The Samsung Galaxy S25 Ultra has a Snapdragon 8 Gen 4 chipset that delivers up to 35 % faster multitasking performance and longer battery life during heavy gaming, compared to the Galaxy S21 Ultra’s  Snapdragon 888.
• Samsung Galaxy S25 Ultra features a 6.9-inch Dynamic AMOLED 2X display with 2,600-nit peak brightness that keeps HDR content clear in direct sunlight, compared to the Galaxy S21 Ultra’s 1,500-nit panel.
• It includes a 200 MP main camera with advanced AI image processing that captures sharper night photos and 8K30 video, while the Galaxy S21 Ultra has 108 MP sensor with 8K24 recording.
• The Samsung Galaxy S25 Ultra supports 45 W wired charging that refills the 5,000 mAh battery to 65 % in 30 minutes, reducing downtime on busy days, compared to the Galaxy S21 Ultra’s 25 W system.
• Samsung Galaxy S25 Ultra has LPDDR5X RAM and UFS 4.0 storage that load apps and transfer files up to twice as fast, compared to the Galaxy S21 Ultra’s LPDDR5 and UFS 3.1 hardware.
• It comes with a titanium frame and Gorilla Glass Armor 2 that withstand harder drops and resist scratches better, compared to the Galaxy S21 Ultra’s aluminum frame and Gorilla Glass Victus.
• The Samsung Galaxy S25 Ultra supports Wi-Fi 7 and Bluetooth 5.4 with LE Audio that deliver gigabit-class wireless speeds and high-fidelity Auracast streaming, compared to the Galaxy S21 Ultra’s Wi-Fi 6 and Bluetooth 5.1.
• Samsung Galaxy S25 Ultra includes a seven-year Android update commitment that keeps security patches and new features coming through 2032, compared to the Galaxy S21 Ultra’s four-year coverage.

Maybe the Samsung Galaxy S21 Ultra price can make you comfortable because it’s a little bit cheaper than the Samsung Galaxy S25 Ultra. But you have to compromise all the above-mentioned features. Now the Decision is Yours. I hope it was helpful to choose the right one.

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What Common Both Can Do?

• Dynamic AMOLED 2X Display: Both devices feature Samsung’s premium Dynamic AMOLED 2X panels, known for deep blacks, vibrant colors, and excellent contrast. They both support adaptive refresh rates up to 120Hz and deliver stunning visuals with QHD+ resolution for ultra-sharp clarity.
• HDR10+ and Always-On Display: HDR10+ enhances dynamic range for supported video content, delivering deeper contrast and better highlights. Both models support Always-On Display to show time, notifications, and battery without waking the screen.
• S Pen Support (Built-in): The S25 Ultra and S21 Ultra both include full S Pen integration, allowing users to draw, write, and navigate with precision. The pen is embedded in the phone chassis on both models, making it easy to store and access.
• Battery Capacity: Each device features a 5,000 mAh battery, which is the maximum found in Galaxy phones. This ensures all-day usage even with demanding tasks.
• Wireless and Reverse Wireless Charging: Wireless charging keeps cords at bay, and both phones also support reverse wireless charging—allowing you to charge earbuds, watches, or other Qi-enabled devices directly from the phone.
• IP68 Water & Dust Resistance: Both phones are IP68-certified, meaning they are protected from dust and can be submerged in up to 1.5 meters of water for up to 30 minutes.
• Ultrasonic Fingerprint Sensor: Samsung uses its secure and fast in-display ultrasonic fingerprint scanner in both models, enabling convenient biometric authentication.
• Samsung DeX Wireless: DeX mode turns the phone into a desktop-like experience when connected to a monitor wirelessly, available on both phones for multitasking and productivity on the go.
• Samsung Knox Security: Built-in defense-grade security through Samsung Knox protects data, apps, and the OS integrity. Both phones include Secure Folder support for storing private content.
• Stereo Speakers Tuned by AKG: Each device features a dual-speaker setup tuned by AKG with support for Dolby Atmos, enhancing audio quality for media, games, and calls.
• 5G Connectivity: Both phones support full 5G networks (sub-6GHz and mmWave), delivering ultra-fast downloads and low-latency mobile internet access.
• USB-C 3.2 Port: Each model uses a USB-C 3.2 port, which supports fast data transfer speeds and high-speed wired charging capabilities.