The whole episode of B.O.T only occurred due to the epic fight between Defensor and Bruticus *sniggers*

The match ups are also kinda supported by the commercials... if you extrapolate a little...

Aerialbots vs stunticons

Defensor vs Trypticon
Bruticus vs Metroplex
Abominus vs Fort Max
Computron vs Scorponok

And to link it back to the origin of this thread....

PREDCONS VS DINOBOTS!!!