2.7 Supercharger Question

I was just wondering what, if any, the differences are between the alpine developments supercharger kit and the nxtgen motorsports supercharger kit. I know if you buy from nxtgen they add headers, and injectors and such but are they the same supercharger?

nextgen uses alpines kits and he makes upgrades for them... next gen knows what hes doin hes a good man and excellent products