Apple Watch Ultra 4 vs. Samsung Galaxy Watch Ultra 2: A Half Marathon Face-Off

For athletes and fitness enthusiasts, choosing the right smartwatch is a high-stakes decision. To settle the debate, I put two of the most capable rugged smartwatches currently available to the ultimate test: a 13.1-mile half marathon. Both the Apple Watch Ultra 4 and the Samsung Galaxy Watch Ultra 2 represent the pinnacle of their respective brand's wearable technology, but only one can truly lead the pack when the pressure is on.

Putting GPS Accuracy to the Test

In a race environment, distance tracking is non-negotiable. Both the Apple Watch Ultra 4 and the Galaxy Watch Ultra 2 feature sophisticated multi-band GPS, and in my field test, both were exceptional. While both devices recorded a slightly longer distance than the official 13.1-mile course, this is typical for urban races due to runners maneuvering around others and weaving across the track. The Apple Watch clocked 13.23 miles, while the Samsung unit registered 13.21 miles—an impressively tight margin.

Heart Rate and Performance Metrics

Without a dedicated chest strap, I relied on my Oura Ring 5 as a baseline for heart rate monitoring. The watches performed remarkably well, with the Apple Watch Ultra 4 recording an average of 159 bpm and the Samsung Galaxy Watch Ultra 2 coming in at 160 bpm. Both devices accurately tracked my exertion throughout the high-intensity zones of the race, making them reliable tools for serious training.

Elevation and Design

Regarding elevation tracking, both watches remained consistent with the race course profile. Although some early reports questioned the Samsung's altimeter precision, I found no such discrepancies during my run. Design-wise, both watches feature a robust, rugged aesthetic. The Apple Watch Ultra 4 boasts a 49mm case, while the Samsung Galaxy Watch Ultra 2 sports a slightly more compact 47mm frame. Both offer excellent visibility in direct sunlight and physical buttons that are easily accessible even with sweaty hands.

The Final Verdict: Which One Should You Buy?

The decision really boils down to your smartphone ecosystem. If you are deeply integrated into the Apple ecosystem, the Apple Watch Ultra 4 is the clear winner as it is designed specifically for the iPhone. Conversely, if you are an Android or Samsung user, the Galaxy Watch Ultra 2 is a powerhouse that offers unparalleled integration with your devices. Both are top-tier contenders that provide the comprehensive tracking features needed for serious endurance sports.