I have both flat bottom (MF 62) and disc plows (MF 64)for my 1957 model TO-35.
I like both plows, if the ground is fairly clean, not much debris, the 3x12's ferguson plows do a great job, but if there is a lot of filth, corn stalks, heavy grass, weeds, etc: then my 3-12's tend to choke up. They just do not enough throat to let the filth pass through, however, 16's plows will do much better as they have more throat.
my old disc plow will not back up from anything, roots, rocks, corn stalks, they just leave the ground rougher, but I like to use them. Great plows.