Here’s some numbers for you.*
- Hulk can mine around 2094 m³/min. (Max yield fit)
- Skiff can mine around 1734 m³/min (Max yield fit)
- Mackinaw can mine around 1626 m³/min. (Max yield fit)
- Orca drone mining maxes out at 1485.2 m³/min.
*) Skills affecting Orca (T2) fit at Lv.5; Skills affecting Exhumers at Lv.4-5.
So to sum it up; No, an Orca does not mine more (faster) than Exhumers. It’s quite possible that it can out mine both the Retriever and the Procurer but they should not be far behind. Let’s not talk about a combination of Industrial command ship(s) using their ability to boost Barges and Exhumer(s), that’s when Orca really shines