A lot of the bowlers I know are parent company loyal. They either like Storm, Ebonite, Brunswick, or independents. Storm has themselves and Roto Grip. Brunswick has themselves, DV8 and Radical. And Ebonite has themselves, Track, Hammer and Columbia.
And if you look at the parent companies, you will see popularity rotate from one brand to another. For a while, Roto Grip was being talked about more than Storm. Right now, I would say Radical is stealing some of what DV8 had established and for Ebonite, it is a toss-up here between Track and Columbia as far as fresh talk.
Brunswick may or may not care where they get their sales from but as a brand, DV8 is probably more niche brand in my eyes.