Rapes are seldom the outcome of a rational decision.
Scenario 1.3: Assange parties with two women, gets slightly too fresh with them and the ensuing sex wasn't completely as agreed on.
Scenario 1.4: Assange parties with two women and the morning after, they decide he's a douchebag and gets worked up that he took advantage of them and what happened was really, actually rape.
Your scenarios also raise the possibility that judgement-inhibiting substances such as alcohol may have been involved in his decision making at the time.
Scenario 1.3: Assange parties with two women, gets slightly too fresh with them and the ensuing sex wasn't completely as agreed on.
Scenario 1.4: Assange parties with two women and the morning after, they decide he's a douchebag and gets worked up that he took advantage of them and what happened was really, actually rape.