motiv is a decent company. it all depends on your style/speed/rev rate in the end. and what you want the ball to do

I've owned balls from both companies and have had great success with both. I threw Brunswick for  2 recent years with great success and then switched to Motiv late last year when forced to drop to 12# balls because of back problems and Dr's orders. Reason for the switch to Motiv is because Brunswick uses the same generic core in all of their light weight balls whereas Motiv uses the same core (but less dense to reduce ball weight) as their heavier balls. I currently have the Primal Scream (now discontinued) and the Thrash Frenzy. The Thrash Frenzy is the first ball out of my bag and appears it may become my all time favorite ball out of all of the bowling balls I have ever owned. It is one of the cleanest balls thru the heads and one of the strongest balls on the back end that I have ever had.