When searching for another important query for " Alexa vs Siri”, the question to answer such a question is to give a comparison chart for better understanding, perfectly revealing the positive and the negative sides of both.
When looking for the cost of an item or a device, "How much does an android phone cost" such a user needs the specific price of each item. That is the actual query, not another thing. You may explain the more on ways to save and have more money in the pocket, or going for the same function of the product but of a lesser price. The content structure you decided to go for, remember to answer the related subheads after each question.
Google likes you to write very long-form content, and also like it to be clear, a concise response that gives a solution to problems. To achieve these, try as much as possible to be brief and summarize your content, especially in the area of points explanation. Make sure you construct your summary like a takeaway gift, it should be vivid which should help the reader to hold something tangible at the end of the write-up.
-Roy-