Instructions: Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.
Input: What's the difference between the two? Later the doctors found out that my case was a bit different. Later on the doctors found out that my case was a bit different. Is one more common than the other?.
Output:
'later' and 'later on' have the same meaning. Sometimes 'later on' is preferred because it has another, smoother rhythmical flow. You can consider 'later on' as just a variant for 'later'.