t-45 transmission

ok now that i know that i can take a regular t-45 and put it in my fox.. is there a difference in how much torque either can handle? Are the gear ratios different? like in a fox you have a t-5 and then a t-5 spec Z for example.. and they are two completely different trannys on the inside.
 
thats why many people brake them I think. I mean do your research. Way i understand is that T-45 is good for 325ft-lb, and TR3650 is good for about 350ft-lb.

I say the hell with T-45. Do it right and dropp T-56 or TKO. I know I would have if I had the money...