Building without HVAC Systems Designed

I got comments back on the energy model for a building that has no HVAC systems designed at the time of completion of the C&S. One comment was that the cooling energy savings seemed too high. The other was that the system airflow and fan power in the baseline seemed too high compared to the proposed. For both cases I let the equipment capacities, airflow and fan power calculate out instead of specifying identical values. Since the baseline has a worse envelope, the higher sensible load led to much higher capacity, airflow and fan power. This made sense to me because the worse envelope would demand the higher capacity system. However, the comments from LEED appear to be rejecting this approach and suggesting that I need to use identical values, but it’s not 100% clear to me that this is the case. The comments do allow for a narrative to justify the method/inputs. I am wondering if my approach is justifiable from LEED's perspective; or if it would be considered absolutely incorrect, in which case I would have to make the capacities, airflow and fan power identical for both cases. I would greatly appreciate any input you may have. Thanks,