Do degrees from the ETH of Zurich value the same as 'normal degrees'?
are candidates with a Msc ETH or Dr. sc. ETH considered too?


Of course, yes.

The reason for the presence of the ETH qualifier is well explained in this answer, and the (possible legal) validity of a certain degree can be established regardless of any qualifier attached to the degree.

Moreover, if you look at the position of ETH Zurich in international rankings, you will see that it can be certainly classified among the top universities. Whatever one can say about the real validity of such rankings, a university would probably not be able to stand in top positions if its graduates were systematically ignored in other university selections. And if this were the case just for the presence of the ETH qualifier, I'm sure they would have already removed it.


  do they think that Bsc ETH = Bsc?


Given the prestige of the ETH Zurich, I'm sure that several if not many selection committees would think Bsc ETH > Bsc.