Found the post of Sridhar Maharaj describing that one will be gainer by Gaur Nam. One can easily imagine then for Nitai Nam.
Shrila B.R. Shridhara Swami: If we have faith in that we will be more gainer then taking Krishna Naam, because there is the consideration called offenses - Krishna Naam kare aparadhera vicara, and less offense in Gaura Naam. But faith in Gauranga that is rare. To have faith in Gauranga, that is costly. But if you anyhow can gather that, then it will be more beneficial than you negotiate direct with Krishna. Direct negotiate… The offense is more possible that side and less offense here. More forgiveness. But Krishna Naam has got some universal characteristics accepted by majority of persons and Gaura Naam is not accepted in such a wider circle. So it is difficult to put faith there. But if one can have his faith, then he will be gainer, because less consideration of aparadha, offense. He has particularily come for the fallen souls. So grace is more there. But to put faith in Him that will be …(inaudible) difficult. Until we can understand Him ontologically we cannot go by the help of our experience. Not accepted by greater circle as Krishna is accepted. So many higher scriptures are also in favor of Krishna avatara, then the wide circle they accept Krishna as Lord, but minor circle accept Gauranga as God and there are not so many scriptures supporting Him. So it is difficult to have faith in Him. But if anyhow one can come nearer, He will be more gainer.