I can confirm that they will fit in the same mount, and use the same control hardware as I pre-wired and installed mounts for trutrak but 8 years later ended up installing grt servos. Perfect fit, but now have extra wiring as grt uses fewer.
They share the same physical mounting dimensions. However, they are not electrically compatible and cannot be used on the others control system. I do not know if they share similar torque specs.