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2 different animals. First you need to decide between a twin screw or centrif. type s/c and then compare brands. Pros and cons to each depending on your app......
votech is less....makes great power... 435 RWHP @ 6350... nice and easy when cruising... ripping when you want power.....
H.O version can be had for 4700-4800 area and install is around 14 hrs...so add $1000 - 1400 depending on your area... and if you do that get a dyno tune.. maybe another 200-300...
IMO procharger is the way to go, KB is good, but like someone else saidyourdeciding between to totaly diffrent superchargers twin screw, centrif..
time to re-search