He can't make the comparison that way. He watched Jones play his entire career and has only seen clips of Sayers.
I actually think its a pretty good post as he pulled out an apt comparison and backed it up with a why. I can't compare Jim Brown to anyone as I didn't get to see him play. I also didn't get to see sayers. I heard a lot of "barry sanders is like sayers" back when, but its hard to comp out guys that we never saw. I'll give RG some credit here for a solid comp and he clearly says Sayers was better.