To those people who are struggling with the "inconsistency" in the sentencing, the Lord Chief Justice said this in the appeal:
^It was open to the jury to consider, as it seems to us, that even if the complainant did not, in fact, consent to sexual intercourse with either of the
two men, that in the light of his part in what happened the meeting in the street and so on McDonald may reasonably have believed that the complainant had consented to sexual activity with him, and at the same time concluded that the applicant knew perfectly well that she had not consented to sexual activity with him (the applicant). The circumstances in which each of
the two men came to be involved in the sexual activity was quite different; so indeed were the circumstances in which they left her. These seem to us to be matters entirely open to the jury. There is no inconsistency.^
There is an inconsistency here though and it is that McDonald should have been charged as a party to the rape by Evans however that was not alleged. Perhaps that would have made it easier for some to understand.
Those who say "how can she have been too drunk to consent to McDonald but not too drunk to consent to Evans" are missing the point, as others have pointed out. She was too drunk to consent to either of them but a conviction requires that the accused reasonably believes she consented. On that point, the difference between the two men could not be more clear. She was raped by both men in that two men had sex with her without valid consent. One of them was acquitted (as so many men are when the woman is drunk) because the criminal conviction requires the prosecution to prove he did not have a reasonable belief that she was consenting.
So many people don't seem to understand that rape is not an offence where one of the parties must be lying. The woman may be telling the truth that she didn't consent or she may have been too drunk to consent and the man may be telling the truth that he believed she did consent. The standard of proof required to achieve a conviction (proof beyond a reasonable doubt of a lack of reasonable belief) combined with rape myths about women lying, a default of consent (very evident on this thread), how rape victims should behave etc. are part of the reason why it's so difficult to get convictions, even for men who are not lionised, rich footballers with lots of money for lawyers.