The poll result are in my opinion, odd.
I've been bushcrafting for a long old time and picked up basically all these items (or identical ones) over the years.
The fixed blade arm sharpeners are vastly superior for a consistent shave sharp edge simply due to their design. I am a bit of a whetstone purest and even I will use one after re-profiling to set a keen first edge.
If the price is too high, build your own for £10
You know, it really doesn't matter which product you purchase, if you aren't capable of sharpening your knives simply because you aren't able to keep a constant and consistent angle to whichever stone you're using. And that IS the problem I've seen with most people over the last 50+ years I've been mentoring folk on Outdoorsmanship skills.