You probably won't appreciate this even though I did repent and offer it to you
The Forge is hardly any quieter than the ITG.
I had the BDM which is almost the same and now, as you know, I have the Forge.
I would actually say it is just as loud with the same whoosh, chatter and, I believe because of the design of the canister and intakes more engine noise as it kind of amplifies it.
I am not actually sure that the ITG gives more power either as somebody else said and also for the same person the Milltek Resonated is apparently quieter than the OEM exhaust. Save your money and get the Pipewerx downpipe to standard. Nice and quiet until you give it some beans!