The greasy one looks like the inner rubber bushings are swollen and disintegrating from the oil the dry one looks like the rubber is not there and looks a little lower we’re the bushing and pin go through .the two look the same ,maybe there already is a shim on the one side .I would take them off to replace the bushings and check the bolts for wear..Carefull taking them apart I think they are fine thread and may need some soaking .
