The extra safety features is the area where these two VPNs are the most different. NordVPN has a clear advantage here, offering many options for more demanding users. ExpressVPN decided to go with the must-have options that are enough for a full protection. Those are the Kill Switch and the DNS Leak Prevention. The only thing that ExpressVPN offers that NordVPN doesn't is a built-in speed test. This feature allows you to test the download speed and ping latency of every server.
The extra tools is the area where NordVPN shines, they have plenty of features for all kind of users. For example, the most paranoid users can use a Double VPN connection. There's more interesting stuff, such as selecting a server by purpose, such as P2P. There's also the recently added CyberSec, to browse with protection against bots, ads and malware. You can see a description of all the options by clicking on the button above.