Auto-translated
I've read a lot and realized that everyone has strayed from the topic, but I'll go my own way and say everything in order:
1: Alt. Alt. and that's it: they are stronger, and often the creatures of level 1 are at the first level, and they fight stronger. In general: Alt.
2: Orig. The flanking attack is used less often, and besides, the crippling attack is much more effective.
3: Alt. The fear attack is more effective, and they are generally better.
4: Alt. But don't start cursing me now, saying I'm an idiot and all that. The powerful strike is often used, and the stats are good; they hit back hard and often, and fighting giants is just great.
5: Orig. I think the flanking attack speaks for itself, and the slight loss in stats is not that noticeable.
6: For battles, each race has its own, but without explanations, read:
Order: Jarls
Necropolis: Jarls
Inferno: Earls
Forest Alliance: Jarls
Dark League: Earls
Magic: Earls
Ranaar: Earls
Northern Clans: Earls
I won't explain further: you'll understand during the game.
7: Orig. The bonuses for the Alt are quite bad, while the original is very good. So, the original.