The pressurized "Pop Can" stoves are pretty neat, and they are fun to build too. The main difference I found was that the "Penny Stove" (a popular pressurized stove design) can be hard to light, especially when it's cold. You have to "Prime" them by pouring a little fuel on top of the stove, even letting some drip down the sides is good. This warms the fuel inside enough to vaporize it and get it started burning. But there've been instances when I had to do that several times to get the stove to light off. In those cases I used more fuel than I would have with a "Super Cat" stove. I have no doubt that practice would have improved my ability to both build and light the stove, but after several cracks at it I was pointed to the Super Cat design.
The Super Cat stove pretty much lights first time, every time. It takes just a few seconds to cool after running out of fuel, so refueling and relighting are both easier for me, if I have to do that. Personally, it's the simplicity of the design that really sold me on it. There's nothing to break or fail or lose. Even if you stepped on it you could probably bend back into shape enough to use it. For me, that almost failsafe simplicity far exceeds any benefits from improvements in efficiency in pressurized stoves. But this choice has a lot to do with when, where, and how I backpack.
It's good to consider how you'll use your stove and choose designs that meet those needs, and then play with them, test them, and evaluate your work. The pressurized designs can be very finicky to build and big differences in performance can be realized with changes in minor details.
The Super Cat stove would not be my choice if I were doing any real cooking. It's really best suited for boiling 2 cups of water. That works great for coffee, oatmeal, and dehydrated (Mountain House) type meals, which is pretty much what sustains me on my trips, and many of my trips are solo so I don't have to think about anyone else's needs.
I have to warn you though, I've known people who've become what might be called "a little obsessive" with backpacking stoves. They are incredibly intriguing little devices that will suck you in with their combustible magic and almost force you to tinker with them.
I'm pretty sure there's a "Alcohol Stovers Anonymous" if it does become an issue for you.