both watches perform brilliantly the Apple watch Ultra 3 has a 1.91 in OLED display with 52x 410 pixels while the Galaxy watch Ultra Sports a slightly smaller 1.5 in AMOLED screen with 480x 480 pixels both offer 3,000 nits of brightness ensuring you can see clearly even Under the Sun both SmartWatches are packed with health and fitness tracking features rate monitoring sleep tracking dual frequency GPS and customizable action buttons make them formidable Fitness companions however each has its unique strengths Samsung's Galaxy watch Ultra excels in sleep tracking even detecting snoring and offers Advanced body composition measurements like body fat percentage thanks to its bioelectrical impedence analysis sensor the Apple watch Ultra 3 shines with broader support for thirdparty fitness apps and extremely accurate heart rate tracking however