Russian or European blooded hogs ?

I will add this, but off topic alil. I caught a Russian sow and had her domino and have 9 pigs. 8 boars and 1 sow. I have the pigs in a horse trailer and have been watching them alot. Some of them boars are built bigger framed than the others and some of their ears built just like deer while others are a touch wider and longer. The ones with deer ears look extremely streamlined even at an early age. I guess the bigger framed hogs maybe throwbacks to a pineywoods rooter or something. Their is definitely small difference that I'd like to see and watch develop.