COROS PACE 4 vs Withings ScanWatch 2: which should you buy?

Who should buy which

• The COROS PACE 4 Guide names it for running, travel and navigation.Running: Threshold pace and race-time estimates proved useful and accurate on runs, and training load and recovery stats come built in. Source linkedSourceTravel: 41 GPS hours and 19 days of daily use mean your training is not tied to a charger. Source linkedSourceNavigation: Landscape and topo maps on the watch help on dense city streets and at every fork in the trail. Source linkedSource
• The Withings ScanWatch 2 Guide names it for health, sleep and fitness.Health: Rest a finger on the bezel for 30 seconds and it records an FDA-cleared ECG that checks for atrial fibrillation. Source linkedSourceSleep: Light and deep sleep, interruptions and overnight HRV are tracked, with a smart wake-up alarm and a Breathing Quality Index. Source linkedSourceFitness: It looks like a classic analog watch, yet counts steps and elevation across more than 40 workout modes. Source linkedSource

From what each Guide names the product best for.