I noticed something from the video presentation of FOR HONOR that could be improve : all the minions have the same model. For knights, i understand the model but for samurai this is unexpected, also it work with wiking. Maybe they got fews details that change but that dont jump on my face. I think a unique model minions for each factions coulld help for the game immersion. (Sorry for my bad english xD, im french)
If you're talking about the major gameplay walkthrough they released, then I think the models used there were very early. I'm guessing they modeled the knights first and used them as placeholders.
In the gameplay shown at E3 (seen here), the models are already different (I posted screenshots over here). The samurai minions are using antiquated shields used by pre-samurai era Japanese infantry, probably so they didn't have to animate entirely separate assets for non-shield-bearing minions, while still making them discernible. It's a nice compromise.
I'm guessing Viking minions will have round shields and either viking swords or axes.