I really don't understand that. What is the relation between AdWords and not having keywords provided? Won't the search query report in adwords have actually le

I really don't understand that. What is the relation between AdWords and not having keywords provided? Won't the search query report in adwords have actually less data than what you get for free with webmaster tools? (With adwords you will only see the traffic from the keywords you decided to bid on, while webmaster tools will show all the organic traffic, including segments you didn't know about).