Well most rape victims will tell you that they'd rather they'd been killed then raped. So yes it would seem that rape is the more heinous of the two acts.
No one wants to be alive after they've been violated. They spend years blaming themselves, when they're the victim. End up with mental health issues, if they didn't have them already and a lot of them live in fear of speaking up about it because they've been threatened or they're worried people won't believe them.
At least with murder the suffering is over. @Bekness
This. I work with mental health patients and rape leads to several mental health disorders that affect people for LIFE. They will literally never lead a normal life again.