a good OTR will give you better performance than a standard CAI that is a fact. as airflow travels straight into the plenem instead of having to change direction half a dozen times. on thing you do have to factor in is the issue of maf reversion, where the airflow can do a multipass over the sensing elements due to pressure changes of each fuel injection pulse and valve closure, it becomes more agressive the closer the maf is to the intake manifold but an experienced tuner can compensate for it.
been a while since ive concerntrated on the alloytecs but pick the brains of reputable tuner shops to get a clearer picture.