Board Thread:Support Requests - Getting Started/@comment-45636951-20201017170509/@comment-9605025-20201017185636

They are analogous but they are also different in a few significant ways.
 * 1) Upvotes are available for Discussions, article comments, blog comments, and message walls whereas kudos were available for Forum (the predecessor to Discussions) only.
 * 2) You can't view who gave an upvote to a post whereas you can see you gave a kudos.
 * 3) The user who posted the message gets a notification when you give the post an upvote whereas kudos do not generate a notification.