Nothing quite like a sweet potato to bring some wonderful flavors to your palette. The regular potato makes us shudder at the thought of all those carbs. But not so with the humble sweet potato. This root has a slightly lower carb rate than the regular potato. Sweet potatoes contain almost twice as much fiber than the regular potato. Did you also know that sweet potatoes are an excellent source of vitamin A and a good source of potassium? A medium sweet potato has at least 28% more potassium than a banana.