Here are some general specifications for these models:
Caterpillar 320D excavator:
Operating weight: 20,670 kg
Engine power: 107 kW
Bucket capacity range: 0.9-1.3 m3
Maximum digging depth: 7.7 meters
Maximum reach: 12.52 meters
Caterpillar 320C_2 excavator:
Operating weight: 20,400 kg
Engine power: 103 kW
Bucket capacity range: 0.9-1.2 m3
Maximum digging depth: 7.67 meters
Maximum reach: 12.15 meters
It's worth noting that specific specifications may vary depending on the model year, specific configuration, and other factors.