I haven't looked into where they derive their Stats from to come to this list order?
From the link: "METHODOLOGY: 80 historical "Best of All Time" lists published over the last 30 years were compiled & assessed; Individual Rankings were scored based on a curve with bonus points for higher tiers; Appearance frequency, list eligibility, and minimum data thresholds were factored in"

Which isn't all that much clearer. Looks like they've used a bunch of 'best of' lists to somehow make a 'best of best of'