If you are comparing a free email extractor with extractor.email, start with the source you already have. Free Email Extractors processes pasted text, CSV files, and copied HTML locally in your browser. extractor.email is the stronger fit when you want a service to fetch a URL or crawl a site for you.
The main trade-off is breadth versus collection convenience. This site gives you a broad set of post-extraction tools - clean, deduplicate, sort, filter, format, and inspect the resulting list - without an account or server upload. extractor.email does better at turning a web address into source material, but its URL-fetch workflow is different from private, local processing.
