Ford won't give you the same 5 year , 100,000 mile warranty with that supercharger as GM would with a stock Camaro which will put out 426hp.
Sure...your GT will be faster. But, it's not a Camaro. It's really your choice. What do you prefer? We won't hate you for going to the "darkside." But, compare them both stock for stock without a supercharger. Remember, if you go supercharger, warranty won't be as good w/ Ford. Also, you are going to blend right in with everyone else before you even leave the lot. If that's cool w/ you, .....
Now, don't buy the Ford...