Between the winner and loser of a bout? At the world level, I think it's one of the best examples of a complete brute overcoming skill with intangibles and chin.
I would say Ivan Calderon vs Giovanni Segura is also an example of one fighter who is much superior in terms of skills but just got overpowered by Segura's aggression. Gilberto Roman vs Sung Kil Moon is another example.
Forrest vs Mayorga was my pick but I'll throw in Baldomir vs. Judah and Carlos Maussa vs. Vivian Harris