I have Jones slightly ahead of Johnson but "on paper" there isn't much between them as Warriors. 12 seasons vs 11, 200+ games each, each made the finals 3 times and 1 grand final. In fact, each had essentially an identical finals record - out in the first week once, out in the grand final qualifier once, lost the GF once. Jones won 44% of his total Warriors games, Johnson won 45%.
Obviously there's a lot more to an individual player than team records, although marquee halfbacks tend to be judged heavily on team success. In terms of getting their teams across the line, SJ and SJ were about equal. Was Jones an outstanding player hamstrung by his team significantly more than Johnson was? Honestly that's not really how I saw it, or remember it.