Please refrain from getting into an argument as I am not taking anyone side but making a general post.
Have you guys actually weighted the OEM MS3 hood? I raised many different hoods in my life (LOL, that sounded funny) from Mazda, Fords, Subaru to Ferrari and let me tell you the OEM MS3 hood is heavy like a mofo but not the heaviest. Try the 2008/09 Subaru Outtback now that's a heavy mofo.
The stock MS3 hood weights at least 60 pounds. A CF/FB hood could weight (obviously it will very) but could weight as little as 16 pounds: so do the math.
So, you bought what appears to be a CF/FG hood? You sure that's what you bought? Perhaps you have a buddy or buddies that know what they're talking about and told you, without actually comparing weights) that there's no significant difference, but wait, there is.
Buying a CF hood for looks? What looks? All you have is a hood (especially if it's CF/FG with no vents and it looks bone stock- the only thing it looks like you bought a used hood and are to cheap to have it painted.
The MS3, unfortunately, looks horrible with a CF hood that is unpainted and has no vents. Whether you buy a vented or un-vented hood (and here is where I throw IMHO) looks horrible. To make this car look good, perhaps give it an edge and keep it low key, paint at least the sides to have it match the outline of the side fenders and leave the middle un-touched.
If you actually did buy real carbon fiber hood you would notice the weight reduction- and if you didn't, either you don't know what you're looking for or actually didn't buy real CF- but that's a different story.
Do you even know what real CF/FG is made out of? Look it up, do some research, do your homework.