Not even close to joking.
As far as being a workhorse, you have to remember that one year was the only season Murray served as a workhorse for Dallas. And he was a huge workhorse that season, without question. But Zeke is a workhorse year after year.
As for the stats in that one season, you have to consider you are talking cumulative stats, which by nature, are dependent as much on workload as effectiveness. I'm not saying it wasn't a great season - it absolute was a great season. But in Zeke's best season he scored 3 more TD's, averaged 0.4 yards per carry more, and a full 4 yards per reception more than Murray did in his best season.