How do the Arrastra's refining capabilities compare to ships like the Expanse, Orion, and Galaxy?

The Arrastra has two 'reactors' that allow it to run two separate orders concurrently. These reactors are much larger than the six found on the Expanse, allowing each order to contain a much higher quantity of goods. While the numbers for player-controlled refining are still being worked out and we don't want to give specifics, expect each reactor to be able to refine around the same amount an Expanse can in one go. Compared to the Galaxy's refining module, these reactors are about the same capacity. Naturally, compared to the Orion's, they are significantly smaller.