Is the key here that with Cline, it's passing huge amounts of the code into context, unlike Cursor? So in some sense it's not surprising it does a better job, because it's executing much more expensive API calls to the LLM provider
People who have become adamant Cline users over a significantly cheaper option have found the ROI of a higher performing AI coding tool far outweighs the inference costs. Even $500/month is negligible if it can 5x (or more) the output of a high-salary engineer.