Ive been using a XP1015 in my SC10, a Savox 1256TG in my buggy and a JRZ9100S in my SCTE.

I have been a HUGE fan of the 1015, however, after i purchased a roller with a JRZ9100S, i have to say, its a really good servo. Faster (Its very very fast) than the 1015 with slightly less torque.

Not a fan of the savox to be honest, have to run a cap with it. Might switch it out for the 1015 in my buggy, keep the 9100 in my SCTE.