From my experience, M-F is the clearest. I've been cooking for over 7 years and have used a pot, burner and microwave. I have tried M-F, LC, Calhoun's, Bear's De-aired, Ozark plastics and Chemionics.
They all are "clear" but that is a very subjective term really. You can see a difference if you cook them side-by-side.
As seen with the Chemionics brand, mixing the plastisol components properly was very important. Improper mixing lead to a completely opaque cup of plastic.
I doubt that the slight hint of cloudiness will ever effect a bait though.
Also, with some products, the micro bubbles will affect clearity. You have to cook the bubbles out to get a true, "clear" bait.
Just info from my experience with the products.
Jim