Identical twin look kinda the same. And they are basicly like the same person because they do the same thing. Fraternal twins do not have the same gender sometimes and they do not look alike. Also have different personalities. Also not really the same personality.
Identical twins are formed through the process of meiosis where a fertilised egg separates to form two identical cells with a common genetic information. Fraternal twins on the other hand are developed from the fertilisation of two different eggs and two sperm cells. This type of twins possess unique genetic information.