Competitive is related to Advantage. Good is a type of Advantage. 
Distinctive is a synonym of Other. Other is similar to Strange. Strange is similar to Exotic. Exotic is the opposite of Plain. 
Competitive <--RelatedTo--> Advantage <--IsA-- Good 
Distinctive <--Synonym--> Other <--SimilarTo--> Strange <--SimilarTo--> Exotic <--Antonym--> Plain 