The fact that Jesus died by crucifixion was not exceptional. Many were executed by the Roman government in this fashion. For that matter, in the course of human history, many men and women have been tortured and killed in brutal ways. Could it be that, physically speaking, other men have suffered greater torment than Jesus? Yes. Think of a POW held captive and brutalized for years and not just one day.
It's not the crucifixion that makes Jesus' suffering so extraordinary. It is that in his crucifixion he bore all humanity's sin and suffering. This is where his torture was singularly unique. This is why he sweat blood. This is why no man can ever identify with his suffering. In this Holy Week, consider an excerpt Martin Luther:
On His soul lay the sins of the whole world. The death he had to suffer was a death caused by sin and imposed by the wrath of God. For since he had stepped into our place, had taken our sins upon himself, and had ventured to render satisfaction for them, he felt both at once, the sins of the whole world and then the death he had to suffer for the sake of these sins.