Indeed. One is given away for free to do whatever you want with it. The other is given away for free to do whatever you want except to be a dick.

If you’re not planning to be a dick, they’re functionally identical.

It’s an improvement.

"Source Available" is "follow whatever my rules are or I will sue you". That could include something as crazy as a license that says "be a dick and I will sue you". For normal people that can't afford legal fees or lawyers that gives "source available" a big range of abusive possibilities.