The main differences between the different series was in the power of Austro-Daimler engines used (185 hp in the early production aircraft, 200 or 210 hp in the mid-production, and 225 hp in the last ones).
The distinctions among the different series were primarily due to the varying engine power of Austro-Daimler engines, with early models having 185 hp, mid-series models having 200 or 210 hp, and the final ones having 225 hp.