Originally Posted by
xray808-11
if the .10 is 15 kg and the .7 is 8kg.Then i think i would use the .10
if you understand what Im saying

Yes, I second.
A servo with less speed but more torque may be faster in the long run... because a less torque servo may slow down under high load. It's a weird inverse relationship kind-of-deal. You must have the perfect balance of speed and torque.