Nice info! :D
Because heat = bad for forced induction, I've read that intercooled setups are the way to go.  Because of the configuration of Roots blowers, they can't use an intercooler.
This makes a huge difference in power.  With an intercooled blower, you can run much more boost without the threat of detonation.
More boost = more power from everything I've read.
Roots:
 
 
Centrifugal:
