I've got both pumps and you can't go wrong with either. It mostly depends on how you want to carry the pump. If your frame has a pump peg, then the Zefal HPX is very convenient to carry under the top tube. The Road Morph is better if your frame doesn't have a pump peg, or you prefer not to carry a pump under the top tube, or you can carry it in your panniers. I've got my Road Morph mounted on the spare bottle mounts under the down tube on my touring bike, since I have no need to carry 3 water bottles. If my frame only had two bottle mounts, I would probably use the Zefal since that bike also has a pump peg so it fits well under the top tube.