Both cards offer primary rental car insurance usually covering the full lost value of the automobile (subject to certain exceptions, of course). (uponarriving.com)
It also comes with a ton of travel and purchase protections, such as rental car insurance, trip delay coverage, and extended warranty. (businessinsider.com)
Many credit cards include rental car insurance as a perk, so you can use that extra money on something a little more fun. (creditdonkey.com)