They both have their place, but Al seems to be making huge numbers with nitrous kits so he's starting to ruin the curve
Al runs alot of electronics in his kits which may become troublesome. With a turbo, there's no electronics, but you have mechanical pieces that may fail (piping, clamps, welds, etc) which may render the car undrivable. There are ups and downs to both and I can't fault anyone for choosing either.