Two articles can compete for the same reader when they answer the same question in slightly different words. Check the existing library before assigning a new title.
Search your own site for the topic and write a one-sentence purpose for the new piece. Compare it with the strongest existing page. A broad explanation and a step-by-step worksheet can support each other if each has a separate purpose.
If the old article already meets the need, update it with the missing example. If the topic deserves a separate article, add a helpful link between the two and make the titles specific enough for a reader to choose.