The phrase "clear superiority" means that someone or something has a significant advantage over others and is clearly better or superior in a certain aspect or situation. Full definition
There was insufficient evidence to show clear superiority of any one approach to delivery. (capmh.biomedcentral.com)
However, when asked to utilise the different systems to help choose the most nutritionally appropriate option among a selection of foods, the traffic - light system usually demonstrates clear superiority. (theconversation.com)
Neither the M3 nor the C63 can claim clear superiority in that respect, with all three cars offering their own variation on «good enough.» (speedsportlife.com)