No, this is a different name for vampires; Nosferatu is a synonym for the word vampire.

No, originally, it was a proper name, but later, due to many games, it became a common noun.

By the way, a strange "dragon" trend can be seen in the alternate upgrades for dragons.
For example:
Necropolis. The Bone Dragon costs 2400 gold. The alternate upgrade (which they call Horrible, I think) costs 1900 gold.
The same is true in the Forest Union.
The Green Dragon costs 3500 gold, the new Rainbow Dragon costs 3400.
And in the League, it's almost the same.
The Twilight and Red Dragons cost the same.
And, of course, the alternate upgrade has better stats.
So, what is this then?
A freebie? Or just a budget option. =)

And also, there's one imbalance: all the creatures have cool abilities. The Jumping Demon can double the damage, and the Lizard Rider will give everyone a beating = 10% of the initial damage when riding towards the target.
That's what happens when balance goes out the window. :(
And the worst thing is, they're threatening to redraw the Necropolis units?
Why?
If they're going to do that, they should redraw the Elves too. I suggest we write a complaint from the entire forum about the alternate Sylvan unit so that it gets redrawn as well