"rival brand" is correct and can be used in written English.
For example, "The company is looking to gain an edge by marketing their product to customers of their rival brand."
The disagreement led to the musician signing a new deal with rival brand Adidas recently.
The rival brand shoots back that Pepsi is perfect "for when they don't have Coke".
Some familiar Disney characters are leading an assault by a rival brand on the battery market.
But it also reflects domestic concerns about the Brotherhood's rival brand of political Islam.
"When your brand is named Glad and not Ziploc," he adds, referring to a rival brand sold by S. C.
Call it soap-powder marketing tactics: more of your own brands mean that there is less shelf space for a rival brand.
Its jeans were being squeezed off the shelves by rival brands.
Brisk's rate of dollar sales growth also exceeded that of rival brands Arizona, up 3.5 percent, and Snapple, up 6.2 percent.
But a claim of simplifying the diaper change of a fidgety baby could snare consumers from rival brands, she said.
Chrysler ran short of minivans, posted a huge quarterly loss and watched as many loyal customers deserted to rival brands.
And diaper marketers cannot easily lure consumers from rival brands, with Mintel reporting that 55 percent of diaper purchasers say they "always or almost always buy" their preferred brand.
