Oh yes, there are some big differences between teams. About what you'd think, dwarves tough and slow, orcs tough and dirty... Wood elves fast and accurate... Humans as generalists. There are different "classes" on the teams. I can only speak to High Elves specifically, who had lineman, white lions (receivers) and dragon princes (blitzers). You can convert your own, or buy the GW ones!
Awesome game, with some great rules and gameplay. Full game should be under 2 hours, too!