Its the other way around: it's easier to detect because detectors are looking for specific "fingerprints" and may even try to run specific JavaScript that will only work when there is a UI present.
(Source: did a ton of web scraping and ran into a few gnarly issues and sites and had to write a p/invoke based UI automation scraper for some properties)
(Source: did a ton of web scraping and ran into a few gnarly issues and sites and had to write a p/invoke based UI automation scraper for some properties)