For the UC responses, you want to make sure that you are showing 4 different sides of you. The responses are only 350 words each so they need to be direct and concise, using examples and showing vulnerability. For the Personal Statement (Common App essay) you have more creative freedom. You only need to answer one prompt and have 650 words to do so. Think about a moment which can help you share your story and make it personal and unique. They have read almost every story but yours can be different by adding your unique spin and details. Own it. Make it engaging and lively and interesting so they hang on every word.