If you want to win with these northern warriors, you'll want to charge the enemy and close the distance as soon as possible. Their range is severely reduced, so they play a more supplementary roll for the Norsca and Wintertooth.
This comes at a price, in that their ranged units just aren't as good as those of other races.
Both sides excel in melee combat and sieges. While the Norsca and Wintertooth trolls look quite a lot different, they fight pretty similarly. Throgg's troll units get a resistance buff, and all of his troops receive immunity to negative terrain effects as well.
But his unique ability, Copious Vomit, is much grosser! He can also construct a building called Troll Country. Like Wulrik, this imposing monster excels in melee combat and sieges. Throgg, also known as the King of Trolls, leads the Wintertooth faction.