No, but depends
No, it is not necessarily true that homosexuals are more likely to transmit hiv-1 and hiv-2 sexually.
It ultimately comes down to the risk behavior of the specific sexual act that leads to HIV infection. Unprotected anal intercourse is the most risky, but whether that occurs with two men or a man and woman, the risk is the same. Unprotected vaginal intercourse is less risky followed by oral sex