In Eve, there are three mining barges. The Covetor clearly holds the distinction of having the highest mining yield for group operations, however I am more interested in the comparison between the highly defensible Procurer for low-sec mining and the Retriever for high-sec AFK mining.
Do these two barges have the same mining yield?
On the surface it seems so, the Procurer only has one turret but it has a 66% cycle reduction in Ice mining and a 200% yield on strip while the Retriever has two turrets, each doing 50% more yield and 33% less cycle on ice. However, when you factor in skills, mining crystals and other equipment that increases yield (or decreases ice cycle time), does one barge outmine the other?