Simulation for CIS, CIGS modules production is significantly worse than for cSi modules. I can't believe that the difference could be so big.
For example: the same horizontal roof without rear ventilation, central Europe
PV*SOL: JA Solar mono cSi = 901 kWh/kWp, Miasole CIS = 829 kWh/kWp = 92% of cSi.
PV Designer Solar Edge: JA Solar mono cSi = 926 kWh/kWp, Miasole CIS = 913 kWh/kWp = 98,5% of cSi.
PV GIS (ERA 5): cSi = 877 kWh/kWp, CIS = 865 kWh/kWp = 98,6% of cSi.