Preheat oven to 375° F. Line a large baking sheet (or two, depending on size) with heavy duty aluminum foil.
Chop sweet and russet potatoes into 1 1/2-inch pieces. Place in large mixing bowl. Add olive oil to potatoes in bowl and toss well. Add sweet smoked paprika, rosemary, garlic, salt and pepper to bowl and mix until spices are evenly distributed.
Arrange potatoes in a single layer on baking sheet(s). Bake until potatoes are golden brown and crisp, about 1 hour. About halfway through cooking, flip the potato pieces to ensure even browning. Remove from oven and let rest for about 10 minutes. Sprinkle with 1/2 teaspoon smoked paprika and serve.