Besides sunburn, there are other ways that people have red splotches on their faces. One of them is more known than the other. Rosacea is the more well-known disorder compared to the other one, which is seborrheic dermatitis. If you have rosacea, your skin will be red, and it may burn. You will also be able to see the blood vessels.
Your nose may also be red and bigger. You may also get pimples are your face. If you have seborrheic dermatitis, then your skin may be scaly, and there will be patches that are yellowish instead of red. Your scalp may have flakes too. Therefore, the differences are that the coloring on the face is different, but a burning sensation is the same for both.