I've only used the swivel blade for peeling potatoes and carrots, but the blade tends to clog. Why? I don't know. Peeling carrots it works fine. Peeling Gold potatoes, it clogs, slowing down the process. Maybe it won't clog with russets, I don't know. I have an old one that's all metal, with some rust development where the blade pivots in the handle, probably purchased from Walmart sometime in the 80's or 90's, that's somewhat dull from years of use and not as fancy as the one being reviewed, but it doesn't clog. I think it was an Echo brand.
The new one, the pair if you will, I don't recommend because it clogs and you have to stop and clear it out a couple of times per potato. Therefor I don't recommend it. Maybe I'll figure out why at some time and change my review, but is it something I would tell everybody, "you've got to get one of these?" No.
I haven't tried the Y-shaped one yet. It looks like it's designed for slicing cheese, maybe.