You can refer to this article: https://blog.container-solutions.com/raft-explained-part-23-...

Yes: https://www.ncameron.org/blog/raft-paper/

Raft achieves consensus with a log as opposed to a single value. This makes it ideal for databases as they are already working with a write log.

Also, it seems that Raft is easier to understand and implement, according to some papers and blog posts I skimmed.