The Musical Express/Matterhorn Bob rides aren't the same thing really.
The Music Express and the like usually go forwards, gathering speed until they're going really fast, and then slow down and do the same thing backwards. They look and feel like a flat ride.
The Bayern Curve rides kind of "rock" between going forwards and backwards until they start doing full circuits; they're basically a powered shuttle coaster in a way. The cars are very similar to coaster trains and they run on a definite track as opposed to being spun round a central hub as on the Music Express rides.
[youtube]http://www.youtube.com/watch?v=FwecptuLPAI[/youtube]
To be perfectly honest, if powered coasters are counted, then I don't see why these shouldn't be. I haven't counted El Paso Express at Hansa myself, but I could understand why people would.