I have both ejector , and extractor double rifles! The Westley Richards have Westley Richards patent ejectors, and the extractors are the very common lift type by whom I do not know. Since I do not have rimless, or belted rimless cartridge double rifles, I don't have either extractor, or ejectors for those, and don't want any.
I can live with either, and do, but the best system I've come across is the selector switch like the Heym, so you have which ever you want, at any given time!