it's hard to sum up all the changes, but on Hive, you can't power up instantly and vote for witnesses. This prevents things like Justin Sun getting huge exchanges to overthrow governance. The main things to consider with Hive are these: Ned Scott, who was not only a moron, but a bad business person, is no longer part of Hive. He is gone, gone gone! He sold out to JS and showed his true colors. Hive also has a decentralized Fund, which was never on Steem. Hive has a real chance at making things right, as long as we all pitch in do our part, speak up when things go wrong, etc.