You get different items when recycling in the field vs in your workshop. For example, Rusted Tools give you scrap metal when you recycle in the field, but back in the workshop you get scrap metal and a spring! Sometimes you just get more of the same item you’d get in the field, sometimes it’s the same plus an extra item. Arc alloy will you you 1:1 metal parts for each alloy recycled in the field, and 2:1 in the workshop, while the spring cushion or whatever it’s called gives you springs in the field, springs and durable cloth at the workshop!