You're mistaken. Hive was forked by nonconsensus witnesses. That's the difference, and it's a very big one. Steem forked with consensus witnesses with the sole purpose to remove funds from users.

Any person can fork the code that is nonconsensus without anyone being affected. With consensus witnesses fork, everyone on that chain is effected.

Since this, all can be proven Justin Sun runs the network, this post from a few hours ago makes it clear as day to a child that Sun does control the network: @crokkon/steem-witness-ranks-excluding-dev365

Since it is known Justin Sun spins up fake accounts and votes them in from one computer, this is a Sybil attack on Steem, by definition: https://en.wikipedia.org/wiki/Sybil_attack