Sforno on Numbers 12:6/ספורנו על במדבר י״ב:ו׳

1אם יהיה נביאכם, if Moses were a prophet on the same spiritual level as you presumed when you said: “G’d spoke to us also,”

2ה' במראה אליו אתודע, G’d would have had to reveal Himself to him in a mirror-like vision, (feminine version of the word mareh). He would not have revealed Himself to Moses while the latter was awake, as for instance in the case of Isaiah of whom it is written in Isaiah 6,1 ואראה את ה' יושב על כסא רם ונשא, or as in the case of Michyahu who claimed to have seen G’d sitting on His throne. (Kings I 29,19) These prophets experienced their prophetic visions while they were asleep, certainly not while they were awake. Also Bileam, even though he was addressed by G’d while awake, was not addressed by the Essence of G’d but by one of His attributes, he himself only hoping that G’d as Hashem would address him (Numbers 23,3). He never attained that level of prophecy, but in response to the wish expressed in above mentioned verse we find ויקר אלוקים אל בלעם, that the attribute Elokim encountered Bileam.