comparative advertising
noun[U]
MARKETINGukusthepracticeofadvertisinggoodsbycomparingthem with, andsuggestingthey arebetterthan, another company'sproducts. Thispracticeisillegalin somecountries:
There is, heclaimed, alonghistoryofallowingcomparativeadvertisingin theUnitedStatesso thatconsumerswill have moreinformationto makeinformedchoices.