I compare a Model no. 1984 Bass 4x12 cab to a Model no. 1982 Lead 4x12 Cab using the same setup:
Gear:
2008 Gibson Les Paul R9 with a SD Alnico II Pro in the bridge
1976 Marshall Super Lead with DF100VH mod
1981 Marshall JCM800 4x12 Model 1984B with Celestion G12-80, 1105 Cones
1982 Marshall JCM800 4x12 Model 1982A with Celestion G12-80, 444 Cones