Erhm, no, I'm afraid you're wrong GR. Zyklon-B and Zyklon are two completely different bands, with both different members and a different sound. The only link they share is Samoth and the fact that they're both Norwegian extreme metal bands.
Zyklon-B: Cult band that released only one 3 track CDS, entitled "Blood Must Be Shed". It's rather good methinks. The band consisted of (they were just a fun project, not a real "band")
- Frost (Satyricon, 1349) - Drums
- Samoth (Emperor, Zyklon) - Guitars
- Ihsahn (Emperor, Peccatum) - Keyboards
- Aldrahn (Dødheimsgard) - Vocals
Zyklon is the latest band of Samoth. It's more death metal orientated than Zyklon-B. They've released two records, namely "World Ov Worms" and "Aeon". This is the line-up:
- Samoth - Guitars
- Trym (Emperor, Enslaved) - Drums
- Destruchtor (Myrkskog) - Guitars
- Sechtdamon (Myrkskog, Odium) - Vocals and bass
The vocalist on the "World Ov Worms" album was Daemon from Limbonic Art.
I highly recommend both bands, though I prefer Zyklon.