If the CTS kit out performed the Revo then your points would be valid. It doesnt. The winner doesnt need excuses!
And where do you see the restrictions in the Revo pipe? From the pictures the Revo pipe looks larger in circumference to that of the CTS. From your pic that kit doesn't even seem to be sitting level. I would even go as far as to say the CTS pipe looks flimsy and unsupported.
And my "fancy" coated one beats the CTS, which is why I bought it - performance. The CTS kit honestly IMO looks cheap, and if this is what you are after then great. If you want the best, buy the Revo. Or even the ITG looks more substantial than that CTS kit. And just looking at pics of the ITG kit, the cone sits in the identical same place as the Revo. I guess they both know something that the CTS guys dont eh...