At the moment I'm unable to listen to the examples on the page linked above, but it's not really a fair comparison and it's conclusion isn't surprising. Good sealing is the primary factor, internal dead airspace volume is the main factor after that, fur or smooth outer surface third.
The Baby Ball Gag is a blimp type screen, which is always going to generally preform best. It's also significantly larger than the Movo, with probably about twice the internal volume. The Rode is fur covered, which is usually going to be more effective than a non-fur covered screen of the same size. I'd like to see that kind of comparison made between usual suspects: Movo WST , the Rycote Super Softie, and the Sure A81WS, which all all more comparable and typically used by tapers when standard foam screens are insufficient.
The way I look at it, choosing the right windscreen is mostly about balancing how much protection is needed against size. I went from small foam screens to big-ass foam screens, to adding fur to those, to BBG with a fur cover, and mostly use the Movos as the most effective solution for what I'm doing without being too large, too delicate, or too costly. It seems somewhat ridiculous to use them for my tiny 1/4" diameter body DPA directional mics, but its not the size of the microphone that determines how much wind protection is needed, and these be about the minimum size that seems to work effectively for me outdoors. I do scheme about the possibly of making something smaller that is equally effective by 3-printing my own blimps designed around those mics.
Here's a question about the Movos: What's the difference between Movo WST and Movo WSTT? I see them listed both ways. They look the same, description is the same.