What the other folks have said about trying to shoot as many different brands is very sound advice. Each one has a fit and feel all their own. I shoot a SCOTT LB-Goose and I also have a T.R.U Ball Cyclone and Rack-master, these are back ups for friends to use. I like them just as equal and each one of them has an adjustment (sensitivity) set screw also. My daughter has shot Tru Fire and T.R.U. Ball, currently she's using the TB it just fits her hand better.
Something to note, what ever release I shoot for hunting I always make sure my back up is the same model. This way I don't have to worry about re-tuning or changing my shooting form out in the bush, if for some reason something happens to my primary.
Have a goodun,
G