ect, prosematic and cruisetronic are normal autogear boxes. cruisetronic has cruise control, prosematic is same but cruise control only in top of the line varient (vti oriel civic), ect has a button that changes shift points according to mode selected (economy or power), same is achieved in other gearboxes by varying load(throttle input) . the mechanical working of these gearboxes is same. (4, 5 gear ratios available along with torque converter that locks to save fuel at highway cruising speeds).
cvt is different it is based on pulleys and belts and the gear ratios are changing constantly on demand. think of it like a ramp compared to steps. it won't transmit jerks to wheels but transit to a different ratio smoothly and is better on fuel economy and performance but some people don't like it because it can accelerate, decelerate without change in rpm(which sounds like a boat, drone).