Supercharger is spooling as soon as you turn the key
right on point. I know this wasn't an option but how about twin turbo? you could have a bigger and smaller turbo that way turbo lag is reduced. plus I think we can have all agree blow off valves sound pretty sweeta super charger is powered with the belts, and has a direct connection to the engine.
a turbo makes very low boost at idle. You won't notice the turbo until they spool up.
A small turbo spools up very fast but puts out very low boost. Larger turbos spool up slower but give a lot more boost on the high end.
I like superchargers better. You get the power on the low end, instantly which would be fun for drag racing and burnouts.