Today, let us understand each of these and walk through a comparison about both.
Let us first understand Sucuri.
Sucuri is specialized in WordPress security. It is a free plugin available for all the WordPress users.
It is a complete security suite which can be integrated with your existing security features.
It well embellishes your existing security by providing features such as Security Activity auditing, File integrity monitoring, Remote malware scanning, Blacklist monitoring, security hardening, post-hack security actions, security notifications, website firewall.