2 & 3: Coat of Scales and Scale Armor cost more, but in exchange for having to pay an extra 1000 gold you get better armor and less fatigue for wearing them. While Heavy Lamellar and Lamellar Harness cost 1000 less gold, they have a few points of armor less and cost more stamina to wear. I’d say that having an armor that has more protection and costs less stamina is worth it. Gold can be earned. Stamina and protection can be a matter of life and death on the battlefield.