Scrapy is a web crawler. This project is a web crawler management UI/platform, so it presumably manages your scrapy crawlers/instances and schedules them.
So if I understand it correct Crawlab is another simple easy to use admin for managing web crawlers, one still needs to use scrapy or write their own crawlers. It should be similar to the admin tool I mentioned in my earlier comment and at:
https://github.com/topics/scrapy-ui
https://github.com/topics/scrapyd-ui