The Cuddebak has a sub 1 second trigger speed and the Primos 35 has about a 1.3 second trigger speed. Earley Primos 35s made a clunk when the picture was snapped newer ones are supposed to be fixed. Primos battery life I'm not sure about but I have heard the Cuddebak is quite good. Always looking at cams and you can check out chasingame.com for independant reviews.