Installation
Optimizers require a single inverter to be installed and DC cabling d protection equipment on the roof. Micro inverters do not and instead, use plug and play connectors to install so from what I hear they are faster. However, if your module already has an optimizer fitted then you are installing single inverter only plus the cabling, this option would be marginally faster. Theoretically, the efficiency of DC or AC transmission from the roof should be about the same, assuming standards are followed.