Road Morphs aren't plastic. They have some plastic parts - just like the Zefal does - but the important bits are all aluminum.

I've had that pump, as well as the HP, the HP-X and the HP-X 4, in the past. First, the HP-X doesn't have 2 stages. Zefal doesn't say anything about a low and high pressure setting. The X part is a release so that you can mount them in your frame and have a good chance that the pump won't jump out of your frame so that you run it over. That the fate of most of the Zefal pumps I've owned. Or the head - the plastic bit on the pump - has broken off.

Second, as I said, I've owned Zefals. If Topeak didn't make the Morph pumps, I'd probably still use one. But they are far from perfect. There are multiple features on the Topeak that are far better than the Zefal. The fact that you don't have to hold the pump head and the wheel while pumping is probably number one. But the gauge on the Topeak is worth it's weight in gold. With the Zefal, I'd pump up on the side of the road, remove the chuck, check the pressure with a gauge, reattach the pump, pump some more, rinse and repeat as needed. Sure you could just pump it up until it 'felt' hard but that's only guessing at the pressure. With the Topeak, you just pump until you get to the right pressure - shown clearly on the gauge - and remove it.

I've also owned two stage pumps from Zefal. I can even tell you where you can find it because I threw it into the trees on the start of an impromptu 5 mile hike back to my car when it would not put air back in the tire.