I own Eador: Genesis from gog. As we all know this original game has no manual in English language. I was wandering if it would be possible to use manual from [MOTBW] as both games are (except for visual side) the same. I dont want to pay 18 USD just for a manual.

Can anyone who owns both games say if the manual is useful?

Mostly - yes. I hear that there are some changes in stamina penalty and couple of new guards, but mostly it is the same game.

It's a simple 'Orks are better than Golblins' type book which does little to teach people the skills needed to play the game.