Interesting Topic.
I used to spend time fishing on the West Coast out of a Sea Kayak when I was growing up.
Since then there has been a huge rise in the popularity of Kayak fishing, . I've only fished out of one kayak with a peddle drive so I can't comment on the specific models mentioned above.
However, I think I can offer a bit of advice on the whole goal of "hands-free, while still being able to control your boat".
At one time I had a great big framed pontoon which was terrible for floats. It was too hard to kick fast enough to slow down the drift or pull over when fighting a fish. It was super difficult to maneuver and would easily get caught by the wind. It worked better on lakes but was still cumbersome.
Since then I bought a small frameless pontoon and it has been absolutely awesome. I bought the Fish Cat Scout and have now traded up for the Outcast Stealth Pro which offers just a bit more room for my very long legs. A good buddy has an older frameless Scadden which he really likes as well. In all these boats you sit closer to the water which allows you to kick way more efficiently. The oars fold down against the pontoons and remain out of the way. With these boats you can control your drift quite easily with your fins while you fish, or ferry across the river if needed while fighting a fish. The guys that fish from Watermasters or some of the other Scadden products probably find similar advantages.
To me, the peddle-drive kayak might work but I think you'd have to constantly be reaching down for the rudder handle to make steering adjustments. With an ultra-maneuverable frameless pontoon, you can kick pretty fast, spin on a dime and be truly hands-free.
If you want something a little more sleek looking, the OSG Commander looks pretty interesting.
Just my two cents...