Apple vs. Samsung Tough Watches: What's Different in Plain English
Samsung and Apple both released tough, high-end smartwatches this summer: the Galaxy Watch Ultra 2 and the Watch Ultra 4. Both have bodies made of titanium, a strong and light metal. Both have 64GB of storage for apps and music. They differ in size, screen, processor, voice helper, and health tracking.
Samsung offers the Galaxy Watch Ultra 2 in gray or silver. Apple offers the Watch Ultra 4 in black or natural, with an Hermes version adding a titanium band and two ocean-themed watch faces Engadget. The Galaxy Watch Ultra 2 is a 47 mm GPS watch. It is 10.7mm thick with a 1.52-inch-wide screen. The Apple Watch Ultra 4 is 12mm thick with a rectangular screen that is 49mm tall by 44mm wide.
Chassis and durability
Both watches use titanium. Apple lists the Watch Ultra 4 as IP6X dust resistant, able to go to 100 meters under water, and rated EN13319 for dive gauges. Samsung lists the Galaxy Watch Ultra 2 as IP69K dust and water resistant, rated EN13319, and able to go to 100 meters under water Engadget. Samsung also lists 10 ATM, another way to say 100 meters of water pressure, and says it supports professional diving. Samsung showed the Watch Ultra 2 and the Watch 9 at Galaxy Unpacked in July 2026.
The broader context for people who make outdoor and diving apps here is that these small rating differences matter. EN13319 and 100 meters appear on both lists. 10 ATM and IP69K appear only on Samsung's list. IP6X appears only on Apple's.
Displays
Samsung uses a round Super AMOLED screen set in a square frame with rounded corners. Apple uses a rectangular OLED LTPO3 screen with Retina sharp-display technology. The Galaxy Watch Ultra 2 reaches 5,000 nits of peak brightness. The Apple Watch Ultra 4 reaches 3,000 nits. Nits measure brightness, like flashlight power. Samsung calls the Ultra 2 screen the brightest display ever on a Galaxy Watch.
In my view, those brightness numbers need real-world context. How easy a screen is to read outside also depends on light sensors, automatic brightness, and always-on settings, but Samsung has more reserve power for bright sunlight.
Silicon and assistants
The Galaxy Watch Ultra 2 is the first Galaxy Watch with the Qualcomm Snapdragon Wear Elite Platform processor, according to Samsung. The model compared here pairs that processor with 2GB of short-term memory and 64GB of storage, with the Google Gemini helper built in. The Apple Watch Ultra 4 uses Apple's S11 processor and has 64GB of storage. It has the new Siri and supports Audio Intelligence features also coming to the Watch Series 12. Apple also offers Siri Recap, which remembers conversations for the user Engadget.
The broader context for app makers here is that each brand stays with its usual partner. It is Qualcomm plus Gemini on one side and Apple chips plus Siri on the other. Short-term memory size was shared only for Samsung in the materials compared here.
Battery and health stack
Apple says the Watch Ultra 4 lasts up to 50 hours per charge. Samsung's Ultra 2 has an 800 mAh battery, which measures how much charge it holds, and Samsung calls it the largest battery in the Galaxy Watch line. Other materials list the Galaxy Watch Ultra 2 at up to 60 hours per charge. Apple described the Ultra 4 in its September 2026 newsroom release titled 'Apple unveils Apple Watch Ultra 4' as the ultimate sports and adventure watch with new advanced health and fitness features and longer battery life Apple. That release came out on September 9, 2026, after an unveiling set for September 9. The health system centers on a new Health Sensing System on the Watch Ultra 4. Apple says the Watch Ultra 4 checks heart rate every five seconds, all day, and calls it the most accurate heart rate sensing in a wearable. Samsung announced the Galaxy Watch 9 with the Galaxy Watch Ultra 2, calling both health companions on the wrist.
The broader context here is how often the watch checks health. Checking heart rate every five seconds, all day, creates much more data and makes it harder to filter movement, track sleep, and save power. In my view, that steady, all-day tracking is now the real contest, more than adding a new sensor, and it should help users get more steady health data without charging as often.
Looking at what this means for builders, the two watches take two paths to the same goal. Samsung pushes brighter screens and bigger batteries with Snapdragon Wear Elite and Gemini. Apple keeps peak brightness lower and pushes steady sensing and on-device audio smarts with the S11 and Siri. Both keep titanium, 100-meter water resistance, and 64GB of storage as the starting point. The choice for technical users will likely come down to which phone system they already use, which dive and outdoor ratings they need, and which voice helper fits their apps.
