@Lilithium
What do you want by "full borg"?
Salt is lower risk. We know that we'll get trade dominance with a 3-action commitment, and this is 2/3 of that.
Snails is higher reward. With the likely fall of the Hath, it's extremely likely that we will get trade dominance with a single [Main] expansion. It also gives us a free "additional effects", it's how we got Watchtowers and the Saltern tech.
It also causes us to go over the limit in Martial. This is kinda bad, but it is the best way to get more land since either we'll be at war with the Hath and crush them with it or they'll fall apart and we'll have to take over more land and place down a new March.