I dont think running a turbo like that will ever make it spool faster. Keep in mind the engine has to fill the runners before it can start to spool the turbo, large manifolds or ones with a lot of pre-turbo volume can be detrimental to spool time.
And yeah that supercharger is pretty extreme, its a twin screw type that gives the killer screaming sound thats obnoxiously loud. One of my goals is to twincharge a capri, I will hopefully get there one day. I wanted to do it RWD though because theres more room that way, plus having 300hp from 2k to 7k on a FWD car with no spool time whatsoever is going to cause massive traction issues