Thor has been active since 1977 and has always been fronted by Canadian legend Jon Mikl Thor. The Necrosexual hasn't been around for exactly that song, but has always been fronted by the fantastic Necrosexual. Now you can watch the latter interview the former, which is equal parts informative and hilarious.
You should also go check out the Necrosexual's new EP The Gory Hole Overture In F#.