Grav Gun. Portal Gun has a bunch of limitations of what can and can't have a portal placed on, plus once you go past a certain area your portals are gone (yeah, I know that they wouldn't be about real world, but still.). But the Gravity Gun can throw shit at anyone!
Portal Gun at its peak - you can place two portals down yourself.
Gravity Gun at its peak - throws people over 20 feet, glows blue, can pick up almost anything and can shoot electric pulses.
Winner-Gravity Gun