product parity
noun[U]
MARKETING,COMMERCEukussimilaritybetweenproductsof the sametype:
Welivein anageofproductparity, when mostofferingsareessentially"good."
Themarketshareoftopbrandshasdroppedbecause ofperceivedproductparity– mostconsumersdon'tseeadifferencebetweenbrands.