The Delegated Proof of Stake mechanism is that in which the block validators are known as witnesses and are selected on the basis of the governance voting among the stakeholders of the platform. Your illustrations are very good in this topic.

Proof of brain consensus shows the capacity of a user to deliver unique content to a blockchain, and when these users are rewarded, equal 50% of the rewards go to the reward pool as same as the curators for verifying the validity of the content.

Proof of Brain mechanism is the need of every social media platform and its implementation in the Steem blockchain is very essential for the creation and support of the quality content on the blockchain.

Thanks a lot for sharing your post with us and I wish you a very good luck for the contest.