Hey,
The problem with this question is we are comparing apples w/ oranges. or if your a guy like me we are comparing super models with the cute girl next door. Both are just as good, but different.
Like with any research you do on a car part your first question should be: What do i need it for.
Here is a few things im just quickly putting down, I am not talking to technical and its just stuff from what i've been around, in other words i could always be wrong.
Superchargers: Superchargers are a way of increasing horsepower with less work. But you get what you pay/work for. It does require HP to power the supercharger, but sence its giving you a postive amount of HP all it really means is that some of the HP gain will cancel out, but not much.
Superchargers are nice a dependable. After installation there is alot less to worry about then a turbo, however the increase is much less. I would use a supercharger if you want something that just goes in and works without you even having to look at it.
Turbo: Turbo's are much different. The most important thing you have to think about with a turbo is what size to get. Bigger DOES NOT mean better. If your running a civic w/ the stock engine, do not get a larger turbo. The bigger the turbo the longer it takes to spool up. While you will get more HP increase w/ a big turbo it will take you much longer to feel the effects of that power. You'll win but you'll have to play a quick game of catch up first.
The other conflict with Turbo's is that the engine is not made to have one! Don't listen to anyone that says all you have to do is install the turbo and your done, you won't. You'll need a new list of parts including some extremely expensive spark plugs (which you will be replacing 3 times as fast as your oil). Turbo's also generally need to be tuned, as well as the engine will. If you don't you will be killing your engine slowly. (or extremely quick when you least need it). Don't let this scare you, just make sure you have some cash standing by and you done your research (and maybe found a tuneshop thats knows you enough to date their daughters, cuz you gonna need their help).
Like i said its comparing two different things. turbo = more power and more responsibililty Supercharger = less power but less work/money. Hope that helps. if you need more info feel free to IM me at ImportRacerFF (aim) or email me at
ImportRacerFF@snet.net ~Brian