Mechanical Linear Actuator Specifications

Hello,
I'm in the market for an electric linear actuator. Can anyone tell me how Ray's specifications for listed torque relates to the the listed peak thrust. Example the type 2 short and long linear actuators M81133&4 state a peak thrust of 480 kg (not kponds) but have different torque figures (1190 & 1660 N m) respectively. The only difference is actuator stroke. Are the Torque values given meant to be max values delivered to the rudder by the actuator or by rudder lift to the rudder stock?

Thanks for any help

Phil