Also, since he doesn't commment, there's no way of knowing what his state of mind was like beyond the events in the Garden of Gethsemane and the statements at judgement and on the Cross. Since all we have are suppositions and empathising, I'd rather go with the picture that's painted of a man being tortured to death using a number of ever more excruciating methods.
You're also extrapolating thoughts from the concubine's head, without a view to the cultural context. She was the concubine of a travelling Levite ( modern day Circuit overseer's wife ) and hence part of Israel and had a one-way ticket into paradise...
Lets see....Godlike person willing submits themself to torture to die for everyone and be resurected to rule vs inperfect woman unwillingly (to say the least I'm sure) gang raped and brutally murdered with a pretty good chance of an afterlife.
Both are brutal deaths, I doubt anyone will argue that, but as you stated previously intent can change the scales a bit. Jesus intended to die this way, the woman didn't. As Crumpet stated:
He had a higher purpose and he knew it wouldnt be long before he was Master of the Universe. The poor concubine (was she childless?) had no hope for the future - her demise as far as she knew was complete and her death meaningless and pointless. Jesus had a comfort he would be remembered forever and worshipped by some. Concubine probably expected to be forgotten forever and had no comfort at the end. A positive thought in the head can diminish physical pain.
Personally I agree with that. But it is all ultimately surmise.