BoxRec

At heavyweight, where Barkley fought the last 3 years of his career (actually got a win over Gerrie Coetzee).

Common opponent: Trevor Berbick (both lost decisions).

Mitch by UD. Not much fireworks due to their background with each other.

Iran Barkley's best work would not be remembered at Heavyweight no matter if he spent the last three years there.
All of his big fights were way south of Heavyweight.
Iran would be too small, Mitch was a decent size heavyweight.
Lower weight fight class another thing.