but everytime you let off you lose your boost and get your lag back with a turbo.......it depends what you want it for. If your autocrossing, a SC may work better in a thight course since there are many corners and you can't afford to wait for a turbo. Most other types of racing, drag or high speed road course will prolly be best with a turbo. Like they say, there is more boost to be had with a turbo.

The biggest difference other than total boost pressure is how the boost behaves.