I was in the same boat a few months ago
I went with the twintake as it's a closed filter, closed filter means "less" heat soak wich means more reliable power (very small tho) in most circumstances
My twintake makes awsome noise, my friends jokes saying he can see the trees bending in as it sucks the air in
Being closed doesn't give you much growle but lots and lots of natural engine noises like chatter and turbo whistle
I have nothing against the ITG and it's a great unit but for my needs the twintake won the pros and cons
Hope that helps
Jack