The Keto diet focuses on a high-fat, moderate-protein, and low-carb approach, with typical macros around 70% fat, 20% protein, and 10% carbs. The Paleo diet emphasizes whole foods and avoids processed items, leading to varied macro ratios but generally promoting high protein and balanced carbs and fats. The Vegan diet centers on plant-based foods for all macronutrients, so it's important to include supplements to prevent nutrient deficiencies in your meals.