Bowlers do try different companies when they have the money. I've tried MoRich, Ebonite, Hammer, Brunswick, Columbia, Storm. Every company releases so many balls that to try them all, it would get very very expensive. The best matchup or company for me has been Columbia. When I have money to get a ball, I go with that companies latest and greatest.
I wish I did have the money to try all the different balls out there. Heck, like someone has on their signature.
"There's a 300 in one of those balls out there".
This also brings up a different question, "How can some of these people accuratly RATE bowling balls is they have never bowled with it?"