Modeling DCV Savings for Proposed Building

To account savings using DCV, we understand that Baseline building ventilation is to be modeled using ASHRAE 62.1 whereas Proposed building ventilation is to modeled as designed. However our Baseline building is being modeled as 1 system per floor (VAV) whereas Proposed building is being modeled as 2 systems per floor (VAV+DCV and CAV). As the Proposed building has 2 different systems (1 with DCV and 1 without), can the baseline building still maintain ventilation according to ASHRAE 62.1? Or do we need to separate the baseline building to 2 systems as well?