Upping performance of Truggy servo

[Big House]

I need a little assistance in getting better performance out of my servo or should I drop the one I am running and find another one. I am currently running a servo from PPP Servos. It turns my truggy pretty good but my Jr turns my GTP much faster. The both cars run the same MMM and receiver so how can I boost the performance to the servo without switching. Thanks.