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

Who should buy which

• The COROS PACE 4 Pro Guide names it for running, travel and navigation.Running: Heart rate ran right in line with a chest strap on runs, and Effort Pace, a race predictor and Virtual Pacer plan your sessions. Source linkedSourceTravel: Pack it for a long trip: 60 hours of GPS and 21 days of daily use per charge. Source linkedSourceNavigation: Free downloadable maps with trail and street names pan with almost no lag. 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.