BoxRec

15 rounds.

Anybody's fight honestly.

Either Weaver takes a decision or Berbick would either takes a decision or stopping Weaver late.

I think that the version of Berbick from 1980-81 is likely going to win by way of a hard fought clear cut decision victory.
Something like 8-5-2 in rounds if it's a 15 rounder. Something like 6-4-2 if it's a 12 rounder.
If we're referring to a 1986 version of Berbick versus a 1980 version of Weaver though then yeah, it's going to be quite different.
Weaver would win in that scenario, and probably he gets Berbick out of there between rounds 8-10.