Some things in the cryptospace are not always clear and one of the things that gets somewhat confusing is when you see the same word but one is in capital letters. @jackmiller goes over the difference between the two in this illustrative video. We hope this gives you a better explanation and understanding of not only Hive/HIVE, but cryptocurrency terms in general. Thank you!
Introduction to Blockchain and Hive
For more information about Hive and Blockchain: hive.io hiveblocks.com