What's covered most of the second half of questions- as for what you'd compare it to, it's fairly unique. It's probably closer to 40k thann fantasy because you control individual models, but also games are much smaller and so you'll very, very rarely have combats where dozens are wiped out in a round of combat or shooting.
If I had to, I'd say it's like a smaller, slower-paced 40k, but more balanced armies and, IMO, more fun to play (and more *gasp* strategic)
|