I started with a Tru-Ball and arrow flight is perfect with center hits. I just picked up a Tru Fire at a price I couldn't pass up. Thought I could use it for a spare in case I drop the other out of my stand or lose it.
My arrows hit low left with it and I can't interchange them. I see a little side wobble too.
Do you fellas see this much difference between makes of releases?

I would not use a different release as a backup.
You may be changing your achor point, wich may change your grip, and so on.
Also the way the jaws come in contact with the string can cause a high or low problem.

Bo, both have the same size and shape jaws and the wrist strap is almost the same. I anchor at the same spot and use a peep. Everything feels the same. It just doesn't make sense that there is such a difference in the point of impact.