The razorback look has more russian in him. The fat butterballs have more domestic. Russian pigs were released and bred with domestics creating ferals. Some express more russian genes than others.
You aren't too far off really...and most of us get the gist of your post.
The problem is....there exists a misunderstanding as to what a 'Feral Hog' is. Often times, folks will write something that can be misconstrued, usually...suggesting that a 'Feral' hog is a different 'species'.
Strictly speaking, 'Feral' simply means 'wild' or having returned to the wild...from a domestic state.
From there... you simply see various displays of genetic diversity in terms of appearance.
But we get what you mean. Keep shooting them.....please.