What car is this for? A contour? in any case Nitros is going to get you places where the broken vortec cant.
Supercharger:
Pros:
Instant Boost
Reusable
Sounds Great
Decent Power gains
Cons:
Needs a Tune
unreliable
need new clutch/LSD etc.
Expensive
Nitros:
Pros:
75 HP easy
Relativly cheap compared to SC
Dont need a LSD/Clutch etc.
Cons:
Have to refill bottle
Cant always use it
Needs a Tune
Needs a Flip Chip