Horus from what i understood was the charismatic leader and his legion excelled at what Astartes do best. They found and chopped off the head of the enemy letting the body die.
Guilliman was the logistician of the primarchs. Efficient, humble and did what was asked.
World Eaters and Space Wolves aren't imho the same in 30k. Both were ferocious but while the WE were raving lunatics on the battle field mowing down entire armies. the Space Wolves were the Emperor's sanction. Psychic resistent, fierce and viewed as barbaric (IE simple minded) which gave them an advantage because they used their enemies underestimation against them.
Blood Angels and Emperor's Children are the mirrors of each other pre heresy in my opinion. though we'll see more when the BA get some attention in the HH. I always saw the two as that appreciated and valued civilization and artistic expression.
Corax and the Night Haunter might be mirrors of one another but each have their own take on stealth. haven't seen enough of either during the heresy to say for sure.
I won't speak to the others until there is more written about each of them.