Difference in ring gap could mean the hard break-in rings were more severely worn. Or it could suggest the soft break-in rings were showing a tighter gap because the rings never bedded in. They'd have to had measured both engines before and after running to really learn anything.That's fine, but there was a vid sometime ago of testing factory v hard break in on 2 new Honda singles. They claimed that there was no significant wear difference in the rings and other wear items. But, being internet experts, they glossed over the large increase in ring gap. From memory it was around 10 to 15% greater. That indicates the service life of that engine was shortened by the hard break in.
That may not worry the first owner, but it will bite some poor bugger on the butt later on.
Hard break ins are fine if you don't give a damn about that, or you're a race team who doesn't have the time to do a proper break in. (They tend to rebuild engines far more often anyway).
This idea is why I'm reluctant to buy used bikes or high performance cars. I was lucky with my 09, I could only afford used then.
What kind of engine was it?