Finder is heavily optimised by Apple and it’s fast. But it doesn’t verify what it copies, and when it runs into an error, it stops. If you’re not watching the screen at that moment, a stopped copy is easy to mistake for a finished one. On a busy offload on set, that can be a costly mistake.
Seatbelt is smarter. It verifies every single file using fast industry standard hashing, and gives you detailed, searchable logs for peace of mind. If a copy fails, you’ll know about it. And you’ll be able to quickly find the problem file or drive.