Which IK is more powerful Carrara's or Poser.  Also can I do constraints and animate them in Carrara. Between Figures. Lets say figure A puts his hand on figure B shoulders and pushes so figure B falls to floor. Or Figure A lifts figure B by grabbing it by the hips and figure B holds unto it by grabing figure A left shoulder.

That type of animaton ideally needs IK that can be made on for some frames and then taken off to others or ideally types of constraints that can be keyframed.

Poser is really weak in this area. Something like Motionbuilder is easier to do this sort of animation. Now how powerful is Carrara in this regard?